Comment 1 for bug 1200022

Reviewed: https://review.openstack.org/36581
Committed: http://github.com/openstack/neutron/commit/3732f022778a7c4a47c58029ae77e32a0a4a6ee9
Submitter: Jenkins
Branch: master

commit 3732f022778a7c4a47c58029ae77e32a0a4a6ee9
Author: Kevin Benton <email address hidden>
Date: Wed Jul 10 16:28:12 2013 -0700

    Prevent possible server list damage in BigSwitch plugin

    The old failover logic for the BigSwitch plugin modified a
    list of controllers as it tested them. If the code for one
    thread unexpectedly raised an exception or died, the global
    server list could lose a server permanently.
    This patch addresses that by flagging servers as failed instead
    so the global server list is never modified.

    Fixes: bug #1200022
    Change-Id: Id2dcb820ef9f62fd03e3215bff3345e56c78afe2