Comment 4 for bug 1022520

Reviewed: https://review.openstack.org/9547
Committed: http://github.com/openstack/nova/commit/ab7e4f2817d8201cd2364cf09aa01f505e911183
Submitter: Jenkins
Branch: master

commit ab7e4f2817d8201cd2364cf09aa01f505e911183
Author: Dan Smith <email address hidden>
Date: Mon Jul 9 13:37:01 2012 -0700

    When deleting an instance, avoid freakout if iscsi device is gone

    It's fairly easy to get into a state where an instance is not running,
    the iscsi infrastructure has been torn down, and the instance cannot
    be deleted because the iscsi device cannot be successfully removed.
    This patch ignores the associated return value for that scenario and
    marches forward in the teardown process.

    Fixes bug 1022520

    Change-Id: Ib28790892eebe341ac10a92250cf872605fefe9b