Docker and docker-py can now be unpinned since Kolla has been
converted to using the kolla_docker module and we no longer rely on
upstream to unblock us.
Change-Id: I6ee2b78c31ef0447da6154b75db381d5cdd55ab6
Partially-Implements: blueprint kolla-docker-module
So we can respect DRY and share as much code as possible I have broken
out the common code between the aio and multinode gate scripts.
Additionally, this lays the ground work for removing our policy on
root-everywhere by using sudo. Once we get the non-root stuff worked
out we can gate as non-root user.
Change-Id: I781c597ab10f2296b95f51ae27e0fa617ffe0a66
Partially-Implements: blueprint multinode-gate