Updated openstack/openstack
Project: openstack/keystone  c4c89b793d6661420009241e62bea8fcb79561c8
null
Convert test_backend_ldap to config fixture

The test_backend_ldap module wasn't using the config fixture for
setting config options.

Change-Id: I3f0e1ba13f0be3625db5a7eb275a3d7fd2bd41e5