Fix CI failures
Fix CI failures

reference to:
http://osdir.com/ml/openstack-dev/2016-12/msg00420.html
/nova/tox.ini

Change-Id: Ie566f4b7c1c3cd3c1654281c0cad028c3886d9f7

openstack/watcher,stackforge/watcher,stackforge/watcher,openstack/watcher