Updated openstack/openstack
Project: openstack/python-novaclient  43f1f7851a1ad46478d00183fd438cfde86c05ff
null
Replace assertEqual(None, *) with assertIsNone in tests

Replace assertEqual(None, *) with assertIsNone in tests to have
more clear messages in case of failure.

Change-Id: I6deee90c31adf61d80e2678a5f29ba9e187281c9