Comment 10 for bug 1520775

Reviewed: https://review.openstack.org/413746
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=a66af420914aa4c45b7c61daf36e36cff28d75b2
Submitter: Jenkins
Branch: stable/mitaka

commit a66af420914aa4c45b7c61daf36e36cff28d75b2
Author: root <email address hidden>
Date: Thu Jul 7 13:32:44 2016 +0000

    Delete default route if no gateway in external net

    Currently, when the default route is added to device, there is no
    way to delete it. Even if user clear the gateway ip of external
    net, there is still a default route present in router namespace.

    This patch will check the default route in namespace first. If its
    gateway ip is not one of the gateway ips in external net. This
    default route will be deleted.

    Change-Id: If2ab88b392f3935306d73e3c2de0a35548567464
    Closes-Bug: #1520775
    (cherry picked from commit f9d0dd39e6b3b14244e0a185c4a1f7f35f48f3e7)