Can't detach interface from VM (if VM has two interface with same mac addresses)

How to reproduce:

1. Run any VM.
2. Create two networks.
3. Create two ports for each network with same mac addresses
4. Attach those ports to VM
5. Try to detach any interface.

Expected result:
The interface should be detached from VM.

Actual result:
We don't get any errors (via API) on previous steps but an interface still attached to VM

Environment:
* fuel_release: 9.0
* fuel_openstack_version: mitaka-9.0
* libvirt0: 1.2.9.3-9~u14.04+mos10
* hypervisor: Libvirt + KVM

Example:

(OpenStack-venv)agent@laptop ~/projects $ nova interface-list c5ae5a9a-54a2-47b8-800e-619b8bc286f5
+------------+--------------------------------------+--------------------------------------+----------------+-------------------+
| Port State | Port ID | Net ID | IP addresses | MAC Addr |
+------------+--------------------------------------+--------------------------------------+----------------+-------------------+
| ACTIVE | 0d9377b4-4f8f-467a-bae7-54d0d70e5262 | 3f5adcaa-d3e5-4caf-be8f-474751de5589 | 192.168.0.1 | fa:16:3e:60:46:1f |
| ACTIVE | 13cac036-7b6d-4188-879f-650c8d9e1f63 | 28939866-7379-4279-800c-b64c2776e1e0 | 192.168.111.82 | fa:16:3e:24:0d:a4 |
| ACTIVE | 310b9883-806d-4038-a095-1625abecbcb1 | 311c5a7e-5cb0-47e2-8aa0-20d74c4ee8c2 | 192.168.0.1 | fa:16:3e:60:46:1f |
+------------+--------------------------------------+--------------------------------------+----------------+-------------------+
(OpenStack-venv)agent@laptop ~/projects $ nova interface-detach c5ae5a9a-54a2-47b8-800e-619b8bc286f5 0d9377b4-4f8f-467a-bae7-54d0d70e5262
(OpenStack-venv)agent@laptop ~/projects $ nova interface-list c5ae5a9a-54a2-47b8-800e-619b8bc286f5
+------------+--------------------------------------+--------------------------------------+----------------+-------------------+
| Port State | Port ID | Net ID | IP addresses | MAC Addr |
+------------+--------------------------------------+--------------------------------------+----------------+-------------------+
| ACTIVE | 0d9377b4-4f8f-467a-bae7-54d0d70e5262 | 3f5adcaa-d3e5-4caf-be8f-474751de5589 | 192.168.0.1 | fa:16:3e:60:46:1f |
| ACTIVE | 13cac036-7b6d-4188-879f-650c8d9e1f63 | 28939866-7379-4279-800c-b64c2776e1e0 | 192.168.111.82 | fa:16:3e:24:0d:a4 |
| ACTIVE | 310b9883-806d-4038-a095-1625abecbcb1 | 311c5a7e-5cb0-47e2-8aa0-20d74c4ee8c2 | 192.168.0.1 | fa:16:3e:60:46:1f |
+------------+--------------------------------------+--------------------------------------+----------------+-------------------+

logs from compute:

libvirt:
<11>Sep 7 12:18:00 node-9 libvirtd: 11320: error : virDomainNetFindIdx:11005 : operation failed: multiple devices matching mac address fa:16:3e:60:46:1f found

nova compute:
<183>Sep 6 17:58:04 node-7 nova-compute: 2016-09-06 17:58:04.348 7652 DEBUG nova.objects.instance [req-db381757-3fbf-4bb8-a4df-160e1422a005 2b96e098d62147d8b9a15f635e0dd51a 4b867602d6974059afb2489a71dfaabb - - -] Lazy-loading 'flavor' on Instance uuid d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a obj_load_attr /usr/lib/python2.7/dist-packages/nova/objects/instance.py:895
<183>Sep 6 17:58:04 node-7 nova-compute: 2016-09-06 17:58:04.430 7652 DEBUG nova.virt.libvirt.vif [req-db381757-3fbf-4bb8-a4df-160e1422a005 2b96e098d62147d8b9a15f635e0dd51a 4b867602d6974059afb2489a71dfaabb - - -] vif_type=ovs instance=Instance(access_ip_v4=None,access_ip_v6=None,architecture=None,auto_disk_config=False,availability_zone=None,cell_name=None,cleaned=False,config_drive='True',created_at=2016-09-06T17:41:02Z,default_ephemeral_device=None,default_swap_device=None,deleted=False,deleted_at=None,disable_terminate=False,display_description='4894d01a-e464-4d17-b309-3c39a9875147',display_name='4894d01a-e464-4d17-b309-3c39a9875147',ec2_ids=<?>,ephemeral_gb=0,ephemeral_key_uuid=None,fault=<?>,flavor=Flavor(211),host='node-7.domain.tld',hostname='4894d01a-e464-4d17-b309-3c39a9875147',id=277,image_ref='9213a377-e2c2-4cc1-b1e8-483369db03fa',info_cache=InstanceInfoCache,instance_type_id=211,kernel_id='',key_data=None,key_name=None,launch_index=0,launched_at=2016-09-06T17:41:08Z,launched_on='node-7.domain.tld',locked=False,locked_by=None,memory_mb=512,metadata={},migration_context=<?>,new_flavor=None,node='node-7.domain.tld',numa_topology=<?>,old_flavor=None,os_type=None,pci_devices=<?>,pci_requests=<?>,power_state=1,progress=0,project_id='4b867602d6974059afb2489a71dfaabb',ramdisk_id='',reservation_id='r-ybcxxyxm',root_device_name='/dev/hda',root_gb=1,security_groups=SecurityGroupList,services=<?>,shutdown_terminate=False,system_metadata={image_base_image_ref='9213a377-e2c2-4cc1-b1e8-483369db03fa',image_container_format='bare',image_disk_format='iso',image_min_disk='1',image_min_ram='0'},tags=<?>,task_state=None,terminated_at=None,updated_at=2016-09-06T17:41:08Z,user_data=None,user_id='2b96e098d62147d8b9a15f635e0dd51a',uuid=d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a,vcpu_model=<?>,vcpus=1,vm_mode=None,vm_state='active') vif=VIF({'profile': {}, 'ovs_interfaceid': u'4461eba1-a2cd-48f4-9289-86fc8d33bf12', 'preserve_on_delete': True, 'network': Network({'bridge': u'br-int', 'subnets': [Subnet({'ips': [FixedIP({'meta': {}, 'versio
<183>Sep 6 17:58:04 node-7 nova-compute: 2016-09-06 17:58:04.432 7652 DEBUG nova.virt.libvirt.vif [req-db381757-3fbf-4bb8-a4df-160e1422a005 2b96e098d62147d8b9a15f635e0dd51a 4b867602d6974059afb2489a71dfaabb - - -] vif_type=ovs instance=Instance(access_ip_v4=None,access_ip_v6=None,architecture=None,auto_disk_config=False,availability_zone=None,cell_name=None,cleaned=False,config_drive='True',created_at=2016-09-06T17:41:02Z,default_ephemeral_device=None,default_swap_device=None,deleted=False,deleted_at=None,disable_terminate=False,display_description='4894d01a-e464-4d17-b309-3c39a9875147',display_name='4894d01a-e464-4d17-b309-3c39a9875147',ec2_ids=<?>,ephemeral_gb=0,ephemeral_key_uuid=None,fault=<?>,flavor=Flavor(211),host='node-7.domain.tld',hostname='4894d01a-e464-4d17-b309-3c39a9875147',id=277,image_ref='9213a377-e2c2-4cc1-b1e8-483369db03fa',info_cache=InstanceInfoCache,instance_type_id=211,kernel_id='',key_data=None,key_name=None,launch_index=0,launched_at=2016-09-06T17:41:08Z,launched_on='node-7.domain.tld',locked=False,locked_by=None,memory_mb=512,metadata={},migration_context=<?>,new_flavor=None,node='node-7.domain.tld',numa_topology=<?>,old_flavor=None,os_type=None,pci_devices=<?>,pci_requests=<?>,power_state=1,progress=0,project_id='4b867602d6974059afb2489a71dfaabb',ramdisk_id='',reservation_id='r-ybcxxyxm',root_device_name='/dev/hda',root_gb=1,security_groups=SecurityGroupList,services=<?>,shutdown_terminate=False,system_metadata={image_base_image_ref='9213a377-e2c2-4cc1-b1e8-483369db03fa',image_container_format='bare',image_disk_format='iso',image_min_disk='1',image_min_ram='0'},tags=<?>,task_state=None,terminated_at=None,updated_at=2016-09-06T17:41:08Z,user_data=None,user_id='2b96e098d62147d8b9a15f635e0dd51a',uuid=d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a,vcpu_model=<?>,vcpus=1,vm_mode=None,vm_state='active') vif=VIF({'profile': {}, 'ovs_interfaceid': u'4461eba1-a2cd-48f4-9289-86fc8d33bf12', 'preserve_on_delete': True, 'network': Network({'bridge': u'br-int', 'subnets': [Subnet({'ips': [FixedIP({'meta': {}, 'versio
<183>Sep 6 17:58:04 node-7 nova-compute: 2016-09-06 17:58:04.436 7652 DEBUG nova.virt.libvirt.config [req-db381757-3fbf-4bb8-a4df-160e1422a005 2b96e098d62147d8b9a15f635e0dd51a 4b867602d6974059afb2489a71dfaabb - - -] Generated XML ('<interface type="bridge">\n <mac address="fa:16:3e:74:b0:c8"/>\n <model type="virtio"/>\n <source bridge="br-int"/>\n <target dev="tap4461eba1-a2"/>\n <virtualport type="openvswitch">\n <parameters interfaceid="4461eba1-a2cd-48f4-9289-86fc8d33bf12"/>\n </virtualport>\n</interface>\n',) to_xml /usr/lib/python2.7/dist-packages/nova/virt/libvirt/config.py:82
<179>Sep 6 17:58:04 node-7 nova-compute: 2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [req-db381757-3fbf-4bb8-a4df-160e1422a005 2b96e098d62147d8b9a15f635e0dd51a 4b867602d6974059afb2489a71dfaabb - - -] [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] detaching network adapter failed.
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] Traceback (most recent call last):
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1539, in detach_interface
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] guest.detach_device(cfg, persistent=True, live=live)
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/guest.py", line 357, in detach_device
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] self._domain.detachDeviceFlags(conf.to_xml(), flags=flags)
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 186, in doit
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] result = proxy_call(self._autowrap, f, *args, **kwargs)
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 144, in proxy_call
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] rv = execute(f, *args, **kwargs)
2016-09-06 17:58:04.441 7652 ERROR nova.virt.libvirt.driver [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] File "/usr/lib/python2.7/dist-packages/eventlet/
<180>Sep 6 17:58:04 node-7 nova-compute: 2016-09-06 17:58:04.473 7652 WARNING nova.compute.manager [req-db381757-3fbf-4bb8-a4df-160e1422a005 2b96e098d62147d8b9a15f635e0dd51a 4b867602d6974059afb2489a71dfaabb - - -] [instance: d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a] Detach interface failed, port_id=4461eba1-a2cd-48f4-9289-86fc8d33bf12, reason: Failed to detach network adapter device from d95ab3d6-6b8f-42f0-8bf8-a553e99ee41a