Comment 3 for bug 1581348

Reviewed: https://review.openstack.org/315926
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=084173338e5e21ff37f042f69718237b94843665
Submitter: Jenkins
Branch: master

commit 084173338e5e21ff37f042f69718237b94843665
Author: Hong Hui Xiao <email address hidden>
Date: Fri May 13 07:12:57 2016 +0000

    DVR: Fix check multiprefix when delete ipv4 router interface

    Current code will prevent from deleting router centralized snat port,
    when there is a ipv6 subnet attatched to DVR.

    This is correct when deleting a v6 router centralized snat port, because
    multiple v6 subnets share one router port.

    But it is not correct when deleteing a v4 router centralized snat port,
    because v4 subnet doesn't share router port with v6 subnet. Deleteing a
    v4 router centralized snat port should be allowed no matter if there is
    v6 subnet attached to DVR.

    Change-Id: I2d06c8c79f9ff9a9300a94bcbbae13569e4d963e
    Closes-bug: #1581348