Comment 2 for bug 1489014

Reviewed: https://review.openstack.org/217272
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=1b25e30800c869dacca58afa6b8bf92f4cf9d377
Submitter: Jenkins
Branch: master

commit 1b25e30800c869dacca58afa6b8bf92f4cf9d377
Author: rossella <email address hidden>
Date: Wed Aug 26 16:06:25 2015 +0000

    _bind_devices query only existing ports

    If a port is deleted right before _bind_devices is called,
    get_ports_attributes will throw an exception since the row
    corresponding to the port doesn't exist in the OVS DB.
    Avoid that setting if_exists to True. The port will be
    processed as deleted by the agent in the following iteration.

    Change-Id: Ia6590d76f8683e6cba562cde3c39b051549f6c04
    Closes-bug: #1489014