A functional libvirt + nova_compute + nova_network

This imports sdakes' nova-docker codebase to show that atomic upgrades
work atleast with nova networking.  This has many corrections.

For more details read:

http://sdake.io/2015/01/28/an-atomic-upgrade-process-for-openstack-compute-nodes/

Implements-blueprint: blueprint libvirt-container
Partially-implements; blueprint container-set-compute-operation-nova

Change-Id: I858ea113c5656b6da5d2fd13502fecdbd085c8da