Make deploy.py ignore conf files not ending w/ .j2
Make deploy.py ignore conf files not ending w/ .j2

Without this "python kolla_mesos/cmd/deploy.py" will fail when
editing service config files at the same time (when the editor
creates temporary files). And it is safer to ignore non-Jinja2
files in any way.

Change-Id: Ia38bdf3ad72d1e99d57d261fb473abe3ea905c67

openstack/kolla-mesos,asalkeld/kolla-mesos,openstack/kolla-mesos,openstack/kolla-mesos