Match only haproxy for docker ps and skipp all *-haproxy occurences
Match only haproxy for docker ps and skipp all *-haproxy occurences

The grep regexp can match several lines if the haproxy pattern
is present.
By matching only the started by a whitespace it will match
the haproxy container listed by docker ps:
[...] Up 17 hours   neutron-haproxy-qrouter
[...] Up 20 hours   haproxy-bundle-docker-

Change-Id: Id63991e862ab10170c8afbde7a11677cc3d2e2f6

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates