Updated openstack/openstack
Project: openstack/horizon  f85ed2e5950f01a4377b794dc27509cdb2c02626
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: I2506fe57adb98c52147138d8eb6c0254423ffdd7