Verify config support cinder on subpath
Verify config support cinder on subpath

verify-config should support cinder running on a subpath.
Currently it doesn't because it strips the entire path from the
identity endpoint in the catalog when calculating the
unversioned endpoint. The fix is to only strip off the last part of
the path.

Change-Id: Ie8a0eeab1bf31887d6f37cf155b2d161ddfb172d

Juniper/tempest,cisco-openstack/tempest,openstack/tempest,vedujoshi/tempest,cisco-openstack/tempest,masayukig/tempest,Juniper/tempest,masayukig/tempest,openstack/tempest,vedujoshi/tempest