Option auth_uri from group keystone_authtoken is deprecated[1].
Use option www_authenticate_uri from group keystone_authtoken.
[1]https://review.openstack.org/#/c/508522/
Change-Id: Id49bdfc04d7f938955aeaeb4c24fc53af1a26d4e
Depends-On: I4c82a63baabd6b9304b302c97cd751a0103d8316
Closes-Bug: #1759098