Comment 0 for bug 1786186

Charms still render auth_url which is deprecated for removal in Stein as of Queens:

https://github.com/openstack/keystonemiddleware/blob/stable/queens/keystonemiddleware/auth_token/_opts.py#L51-L67

    cfg.StrOpt('auth_uri',
               deprecated_for_removal=True,
               deprecated_reason='The auth_uri option is deprecated in favor'
               ' of www_authenticate_uri and will be removed in the S '
               ' release.',
               deprecated_since='Queens',
               help='Complete "public" Identity API endpoint. This endpoint'
               ' should not be an "admin" endpoint, as it should be accessible'
               ' by all end users. Unauthenticated clients are redirected to'
               ' this endpoint to authenticate. Although this endpoint should'
               ' ideally be unversioned, client support in the wild varies.'
               ' If you\'re using a versioned v2 endpoint here, then this'
               ' should *not* be the same endpoint the service user utilizes'
               ' for validating tokens, because normal end users may not be'
               ' able to reach that endpoint. This option is deprecated in'
               ' favor of www_authenticate_uri and will be removed in the S'
               ' release.'),

See charmhelpers/contrib/openstack/templates/section-keystone-authtoken