L3 agent won't set up SNAT rules to external networks if plugin doesn't support ext-gw-mode extension

[Francois Eleouet]

If neutron plugin doesn't support ext-gw-mode, L3 agent won't set-up SNAT rules on router (By default, it'll assume enable_snat==false). In order to behave like prior to ext-gw-mode extension introduction, it should enbale SNAT rules in that case.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/42353

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/42353
Committed: http://github.com/openstack/neutron/commit/71ecc6ba46433999cf6b6c346670337b875832a0
Submitter: Jenkins
Branch: master

commit 71ecc6ba46433999cf6b6c346670337b875832a0
Author: Francois Eleouet <email address hidden>
Date: Fri Aug 16 13:24:20 2013 +0200

    Enable SNAT by default in L3 agents

    If ext-gw-mode extension isn't supported by plugin, it won't
    return enable_snat param in router info. Agent will currently
    default to enable_snat = false, which changes from expected
    default behaviour prior to ext-gw-mode introduction.

    This patch changes L3 agent to enable SNAT by default if plugin
    doesn't support ext-gw-mode extension.

    Change-Id: I35e8f8c20392bff9ac2f875f2c9a1038ab06ad7b
    Closes-Bug: #1212868