Remove version from os_auth_url in service_credentials
Remove version from os_auth_url in service_credentials

In these modern times it appears to be redundant, confusing, and
inflexible.

Change-Id: Ice84fc6042e7ee344f86ac675c5f833f9984db8c

isyippee/ceilometer,cernops/ceilometer,maestro-hybrid-cloud/ceilometer,mathslinux/ceilometer,eayunstack/ceilometer,maestro-hybrid-cloud/ceilometer,fabian4/ceilometer,ityaptin/ceilometer,mathslinux/ceilometer,fabian4/ceilometer,openstack/ceilometer,cernops/ceilometer,openstack/ceilometer,isyippee/ceilometer,redhat-openstack/ceilometer,ityaptin/ceilometer,idegtiarov/ceilometer,idegtiarov/ceilometer,eayunstack/ceilometer,redhat-openstack/ceilometer