Updated openstack/openstack
Project: openstack/keystone  ca8a8a6b1f3f0a6cbd2b1be8fd9d290da9c64ba7

TestAuthPlugin doesn't use test_auth_plugin.conf

TestAuthPlugin doesn't use test_auth_plugin.conf, so there's no
need to load it.

Change-Id: I191600653a23a36bd126aa1b2f461d20aa5b4f08