Replace assertEqual(None, *) with assertIsNone in tests
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: Ia1af9f64f4f0a66c1429d81313b2c27a7c67cdd7
Closes-bug: #1280522

openstack/os-client-config,stackforge/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,dtroyer/os-client-config,openstack/python-openstacksdk,dtroyer/python-openstacksdk,dtroyer/python-openstacksdk