FWaaS v2 extension for L2 agent

[OpenStack Infra]

https://review.openstack.org/323971
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.

commit dbac4b8922a82e38e6e03444640cbabab96c5ad7
Author: Yushiro FURUKAWA <email address hidden>
Date: Tue May 31 18:20:54 2016 +0900

    FWaaS v2 extension for L2 agent

    This patch adds L2 agent extension for FWaaS v2 to handle
    create/update/delete firewall groups on ports. It also
    handles applying firewall group on port, when a port is
    added/created/deleted.

    DocImpact

    Depends-On: Ifd6758617ab8fd49e69ad1a0483fefa479d7b8e7
    Co-Authored-By: Paddu Krishnan <email address hidden>
    Co-Authored-By: Chandan Dutta Chowdhury <email address hidden>
    Co-Authored-By: Nguyen Phuong An <email address hidden>¬
    Co-Authored-By: Inessa Vasilevskaya <email address hidden>
    Partial-Implements: blueprint fwaas-api-2.0
    Change-Id: I9f172be46ee590b99313106fa262019a2583774a