This reverts commit 58e8d870bc1eea3211ed9cb7a2601bb27b6653c2.
opentack-ansible is struggling with tempest failures in the gate due to
503s. Nova api reveals consistent CRITICAL errors with the message
"MissingRequiredOptions: Auth plugin requires parameters which were not
given: auth_url"
Change-Id: If8780ddc85f18f93facc9ee61e773f602f03ccc5