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: I4494127d11456a237af33cc969bde2dae081ce9c
Depends-On: I4c82a63baabd6b9304b302c97cd751a0103d8316
Depends-On: I1bb3489acf1f591eefbad91bdbb666b21a53238a
Closes-Bug: #1759098