Comment 7 for bug 1609540

Reviewed: https://review.openstack.org/350783
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=bcef61703061c578826a3ea26fbf846b6670fb0e
Submitter: Jenkins
Branch: master

commit bcef61703061c578826a3ea26fbf846b6670fb0e
Author: Kevin Benton <email address hidden>
Date: Tue Aug 2 18:46:11 2016 -0700

    Fix indexerror in delete_csnat_port

    The code assumed every port returned from the csnat port query
    would have a fixed_ip that it could compare the subnet it is
    looking for to. This should be a valid assumption however there
    is a path leading to a condition where it has no IPs. This makes
    the cleanup code handle this case and dump a warning until we can
    figure out what causes the interface to lose the IP.

    Partial-Bug: #1609540
    Change-Id: Ida024a231bb3fc09dad0e80498f57a5761ca3420