L2 Model additions to support DVR

[OpenStack Infra]

https://review.openstack.org/102101
commit 10579d28d71bd8aba88d7eb83c6a0e293cae616d
Author: Vivekanandan Narasimhan <email address hidden>
Date: Mon Jun 23 18:53:32 2014 -0700

    L2 Model additions to support DVR

    This patch introduces the models, the DB migrations
    and the config options required by the L2 layer to
    support DVR east/west traffic.

    These changes will be used by the control-plane made
    of ML2, L2pop and L2 agent.

    Two new configuration options have been introduced:
    'dvr_base_mac' is used to set DVR MAC addresses apart
    from tenant ones (every distributed router will have
    ports being created on compute hosts) and
    'enable_distributed_routing' is used to enable dvr
    support in the L2 agent. This gives the capability of
    rolling out the dvr functionality in stages.

    Partially-implements: blueprint neutron-ovs-dvr

    DocImpact

    Change-Id: Iab6505f239d2c4c9bcbf4e32a292d7b4b5320c8e
    Authored-by: Vivekanandan Narasimhan <email address hidden>
    Co-Authored-By: Armando Migliaccio <email address hidden>

[Armando Migliaccio (armando-migliaccio)]

New config variables have been pulled in the documentation in the context of this report:

https://bugs.launchpad.net/openstack-manuals/+bug/1347978