Support Compass OpenStack installation with integrated PLUMgrid Open
Networking Suite. PLUMgrid ONS is a comprehensive software-only
networking solution for OpenStack which integrates with Neutron. The
current implementation supports OpenStack Juno with a single
controller.
* add role for core plumgrid software
* add role for plugin to neutron
* add single-controller playbook to include plumgrid roles
Change-Id: I4c320e9282bcafe450556e70020505fdb5aaf396
701a0b8fef