Updated openstack/openstack
Project: openstack/tempest  8cc36e96c9b5bfb198ac7a9b1b7c063053afc9b7
null
RunTimeError on tearDownClass explained

The RunTimeError appearance on the console frequently caused
confusion, so it's message now explains the situation in a more
verbosely.

Change-Id: I904eeb09f6a7e7ea8a2121bc451d57ddf5f1d277