OS Neutron FWaaS api/jaxrs and associated bindings

Patch#2:
-Removed and cleaned up some comments.
-Fixed null check on Firewall Rules

Patch#1:
The Neutron v2.0 API document can be viewed at:
http://docs.openstack.org/api/openstack-network/2.0/content/

Sample API calls that can be imported into Postman
are located in the OVSDB directory at:
Directory: [ovsdb] / resources / openstack /
File: Neutron-v2.0-API-Examples.json.postman_collection

Change-Id: If37a0dd702aa02db9e94811c9a414718d25f42a7
Signed-off-by: Brent Salisbury <brent.salisbury@gmail.com>