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: Ice018dfd3e48326ce9cac58342d03979559b9e82
1 file changed
tree: be457e31580c663528a20419a7d738ca5e9b8741
  1. neutron/