NSX: make replication mode configurable

[Aaron Rosen]

The replication mode on switches and routers should have been configurable
to use use source replication if one did not want to deploy service node(s).

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/76670

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/76670
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=42c882b9e98755b9e119f6c566fc00a62a420af7
Submitter: Jenkins
Branch: master

commit 42c882b9e98755b9e119f6c566fc00a62a420af7
Author: Aaron Rosen <email address hidden>
Date: Wed Feb 26 13:59:03 2014 -0800

    NSX: Make replication mode configurable

    The replication mode on switches and routers should have been configurable
    to use source replication if one did not want to deploy service node(s).
    This patch fixes that by making this option configurable.

    Change-Id: Id9e8043c602b5e9349c10247eab993e59db5a52c
    Closes-bug: #1285383