Comment 4 for bug 1309187

Reviewed: https://review.openstack.org/141180
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=088b755e621cf9d38f3e41f71256a22ded26a9d6
Submitter: Jenkins
Branch: stable/icehouse

commit 088b755e621cf9d38f3e41f71256a22ded26a9d6
Author: Aaron Rosen <email address hidden>
Date: Thu Apr 17 13:42:39 2014 -0700

    Notifier: Catch NotFound error from nova

    If neutron sends a single event to nova and the server_uuid isn't found
    in nova. The python-novaclient will raise a 404 error. This patch ensures
    we explicitly catch that exception and use LOG.warning instead of LOG.exception
    as this is not an error and can happen when deleting an instance if neutron
    detects that the port_status goes down before the port is deleted because
    nova first unplugs the vif and then deletes it from neutron.

    Closes-bug: #1309187
    (cherry picked from commit c049583e80d9b2234557a11b77d843549f1efa65)

    Conflicts:
     neutron/notifiers/nova.py

    Change-Id: I7e72da61ccf4c1a3ccc48feb0fdf3d165cdda388