Updated openstack/openstack
Project: openstack/python-keystoneclient  c0165b1a88317aced61e8c98d34f078c30bd15b4
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: I8ba72d345ad00f5cde8696ab82c31606ca82a13f