Adds nova scripts for training labs compute node

Adds nova scripts for training labs which will install and configure
nova on a compute node.

Change-Id: Ic5e5a2fee18a8c3f5b016fad75313558e9d28c08
Co-Authored-By: Roger Luethi <rl@patchworkscience.org>
Partial-Bug: 1312764
Implements: blueprint openstack-training-labs
Merge "Adds nova scripts for training labs compute node"