Updated openstack/openstack
Project: openstack/keystone  89859b6dcf2ff71f6324f6915319e689a38c501a

Stronger assertion for test_user_extra_attribute_mapping

The assertion was checking if the value was in the list, but it's
actually the only element in the list.

Change-Id: I8666736ec0eec5a859e646a3e0328a8e6baccde7