Allow running more commands dockerless
Allow running more commands dockerless

The `--save-dependency`, `--list-images`, and `--list-dependencies`
options to the kolla-build commands do not actually require docker
daemon running. This commit stop kolla-build from complaining when it is
called with one of the above options without docker daemon started.

Change-Id: I966587236aca363316db8abbfc04763655b4b68f

rahulunair/kolla,stackforge/kolla,rahulunair/kolla,stackforge/kolla,openstack/kolla,openstack/kolla,stackforge/kolla