Plugin allows to use Neutron with VMware NSX plugin
(https://github.com/stackforge/vmware-nsx)
General plugin workflow:
* Disable nova-network
* Reconfigure nova-compute to use Neutron as network API
* Install neutron-server
* Install custom python-nova package (contains NSXv support for
nova-compute)
Change-Id: Ibfac2c9210208de9171d7406afe30aa96e8c20a3