Updated openstack/openstack
Project: openstack/keystone  009580f4d0f480530760f0f4f998c511eced31aa

Refactor tests regarding required attributes

Some tests regarding the _required_attribute(s) functions in the wsgi
module seemed to be somewhat confusing, so I refactored them trying to
increase readability.

Change-Id: Id9aedcb05063cf0d618399847f6afe73c800aa93