Use template for lower-constraints
Use template for lower-constraints

Small cleanups:

* Use openstack-lower-constraints-jobs template, remove individual
  jobs.
* Sort list of templates

Change-Id: I08349e13587b16f91f0433c6f559bd7089517784
Needed-By: https://review.openstack.org/623229

openstack/monasca-common,stackforge/monasca-common,stackforge/monasca-common,openstack/monasca-common,stackforge/monasca-common,openstack/monasca-common