Changing in cisco exeption.py is requred

Change set https://review.openstack.org/#/c/233766/ leads exeption in
networking_cisco/plugins/ml2/drivers/cisco/n1kv/exceptions.py

there is issue like that
------------------------------
error: testr failed (3)
Failed to import test module: networking_cisco.tests.unit.ml2.drivers.cisco.n1kv.test_cisco_n1kv_mech
Traceback (most recent call last):
  File "/home/ubuntu/workspace/python27/networking-cisco/.tox/py27/local/lib/python2.7/site-packages/unittest2/loader.py", line 456, in _find_test_path
    module = self._get_module_from_name(name)
  File "/home/ubuntu/workspace/python27/networking-cisco/.tox/py27/local/lib/python2.7/site-packages/unittest2/loader.py", line 395, in _get_module_from_name
    __import__(name)
  File "networking_cisco/tests/unit/ml2/drivers/cisco/n1kv/test_cisco_n1kv_mech.py", line 23, in <module>
    from networking_cisco.plugins.ml2.drivers.cisco.n1kv import (
  File "networking_cisco/plugins/ml2/drivers/cisco/n1kv/exceptions.py", line 65, in <module>
    class ProfileDeletionNotSupported(exceptions.NotSupported):
AttributeError: 'module' object has no attribute 'NotSupported'