Add openstack-publish-jobs for pbr.

Change-Id: If7086b6138e961801cef6c4634f0aea49112bd2b
Reviewed-on: https://review.openstack.org/33099
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins