Comment 6 for bug 1541406

Reviewed: https://review.openstack.org/277657
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=7b5f01c2e58cd21ab3d46676ee6a3288012fbb45
Submitter: Jenkins
Branch: master

commit 7b5f01c2e58cd21ab3d46676ee6a3288012fbb45
Author: Brian Haley <email address hidden>
Date: Tue Jan 24 13:34:58 2017 -0500

    Add IPv6 Prefix Delegation support for DVR

    Unlike Legacy routers, DVR Edge Routers have their gateway
    interfaces in the SNAT namespace as opposed to the router
    namespace. Added a new method to the router_info class,
    get_gw_ns_name(), so callers can determine which namespace
    the gateway device lives in. This can then be over-ridden
    in the DVR Edge router class.

    The Prefix Delegation code will also now listen on the
    update_router event from the l3-agent and reset the namespace
    name if it changes.

    Closes-Bug: #1541406
    Change-Id: If6ada5027d0483fac7fc3ff935fee1edfc6e2759