Initial support for Nova in Ansible

Partially-Implements: blueprint ansible-service

Change-Id: I4b0a74bd3e5daa5664f5e1e622bfb40c3285949e

Adds support for glance in ansible

Partially-Implements: blueprint ansible-service
Change-Id: I2d162e79f85877116b0e33b1843de6ccb62a445a

This adds a very basic structure to begin supporting ansible in Kolla.
Ansible can support complete idempotency, but wrapping docker-compose
does not allow idempotency at this time. These playbooks will be
extended to compensate for that in future patches.

Change-Id: I1c9e8d32321e2733f5a9b752edf74b4fe90317ed