So devstack-gate can ship stats off to graphite.
Change-Id: I2048191858963c574d44096a3ecf4f0993238bec
Reviewed-on: https://review.openstack.org/14785
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins