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: I9966c0443f8199c31a66adc1465c6336a7c71dd7
Depends-On: I4c82a63baabd6b9304b302c97cd751a0103d8316
Closes-Bug: #1759098