[ceph] can't unmanage volume

MOS build:
cat /etc/fuel_build_id:
 452
cat /etc/fuel_build_number:
 452
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0

deploy config:
Ceph RBD for volumes (Cinder)
Ceph RadosGW for objects (Swift API)
Ceph RBD for ephemeral volumes (Nova)
Ceph RBD for images (Glance)
1 node - controller; 1 node - compute, ceph-osd

Steps:
- create volume with horizon or via cinder cli
- execute cinder unmanage <ID>

Expected result:
- Volume will be unmanaged

Actual result:
- Volume has status "error_deleting"

root@node-1:~# cinder list
+--------------------------------------+-----------+----------+------+--------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+----------+------+--------------+----------+-------------+
| b5344948-475c-4740-a54c-544a91f1f61d | available | test_vol | 1 | volumes_ceph | true | |
+--------------------------------------+-----------+----------+------+--------------+----------+-------------+
root@node-1:~# cinder unmanage test_vol
root@node-1:~# cinder list
+--------------------------------------+----------------+----------+------+--------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+----------------+----------+------+--------------+----------+-------------+
| b5344948-475c-4740-a54c-544a91f1f61d | error_deleting | test_vol | 1 | volumes_ceph | true | |
+--------------------------------------+----------------+----------+------+--------------+----------+-------------+

root@node-1:/var/log/cinder# cinder list
+--------------------------------------+-----------+--------+------+--------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+--------+------+--------------+----------+-------------+
| 5f842653-d196-4150-a993-7479ad2eefe8 | available | volume | 1 | volumes_ceph | true | |
+--------------------------------------+-----------+--------+------+--------------+----------+-------------+
root@node-1:/var/log/cinder# cinder unmanage 5f842653-d196-4150-a993-7479ad2eefe8
root@node-1:/var/log/cinder# cinder list
+--------------------------------------+----------------+--------+------+--------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+----------------+--------+------+--------------+----------+-------------+
| 5f842653-d196-4150-a993-7479ad2eefe8 | error_deleting | volume | 1 | volumes_ceph | true | |
+--------------------------------------+----------------+--------+------+--------------+----------+-------------+

in /var/log/cinder/cinder-volume.log:
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher [req-9eb37d19-4bf4-41fd-8633-caaed9deb4bd 75e8de81972a4b9f8926d8180b62728a a8a5744cf9964b85ba514f6714c1fc99 - - -] Exception during message handling: Unmanage volume not implemented.
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher incoming.message))
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 185, in _dispatch
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher result = func(ctxt, **new_args)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 169, in lvo_inner1
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher return lvo_inner2(inst, context, volume_id, **kwargs)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py", line 271, in inner
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher return f(*args, **kwargs)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 168, in lvo_inner2
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher return f(*_args, **_kwargs)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 760, in delete_volume
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher 'error_deleting')
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher self.force_reraise()
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher six.reraise(self.type_, self.value, self.tb)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/manager.py", line 725, in delete_volume
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher self.driver.unmanage(volume)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/cinder/volume/driver.py", line 1578, in unmanage
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher raise NotImplementedError(msg)
2016-06-13 14:49:53.059 10507 ERROR oslo_messaging.rpc.dispatcher NotImplementedError: Unmanage volume not implemented.