Every "openstack" cli operation gives
Ignoring domain related config project_domain_name because identity API version is 2.0
Ignoring domain related config user_domain_name because identity API version is 2.0
I feel like this should be auto-detected to v3 but not sure how. Add
the identity_api_version as done in the other clouds.
(I proposed making that message clearer in
https://review.openstack.org/577324)
Change-Id: I22f8d342968c9084d05d841d6e3ab660a62c3262
a05486fa22