currently only supports label expression axes
Change-Id: I5d714affdf101eeb5b0eeae5ed5408d6964c6b77
Reviewed-on: https://review.openstack.org/16908
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins