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: Ie7a5a791f7fafaf9bd60aea2e6bd84e5f9c3f68f
Depends-On: I4c82a63baabd6b9304b302c97cd751a0103d8316
Closes-Bug: #1759098