Leave undercloud images locally after prepare
Leave undercloud images locally after prepare

This saves some time in undercloud deployment, because those images
don't have to be pulled from the undercloud registry.

This change also adds a --verbose so the output is more useful.

Change-Id: I8064d51bed9f3133a8192e9c1a7870f6bb69e2ab
Depends-On: Id75d5288c308e58143662703da3dddbdbcb0cdd9

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