Group Policy: Resource Mapping Driver (Security Groups)

(Patch series identifier: GPM-RMD-SG)

This patch adds the resource_mapping group policy driver for
contract rendering to Neutron security groups. This initial
patch for contract rendering does NOT yet handle policy rule
mappings persistency, as well as ability to handle individual
update of resources: policy-rule, classifier, and action

Partially-implements: blueprint group-based-policy-abstraction

Change-Id: I64acb0c473e5abf6684c2d0a0ee1fed1c29ec0c1
Author:            Stephen Wong <stephen.kf.wong@gmail.com>
Co-Authored-By:    Sumit Naiksatam <sumitnaiksatam@gmail.com>
Co-Authored-By:    Bob Kukura <kukura@noironetworks.com>
Co-Authored-By:    Mohammad Banikazemi <mb@us.ibm.com>
Co-Authored-By:    Mandeep Dhami <dhami@noironetworks.com>
Co-Authored-By:    Ivar Lazzaro <ivarlazzaro@gmail.com>
Merge "Group Policy: Resource Mapping Driver (Security Groups)"