To support multinode we must now distribute our setup to multiple
hosts. Instead of making special rules for this, we are going to
convert our existing setup to Ansible. This way both setup proceedures
take place in the exact same fashion.
Partially-Implements: blueprint multinode-gate
Change-Id: I43ece298bba994e9b5083403ef3cf6d4245cda6d
f9ee96f216