Comment 9 for bug 1261631

Reviewed: https://review.openstack.org/67449
Committed: https://git.openstack.org/cgit/openstack/oslo-incubator/commit/?id=7fe95de20ccdfa5aa523ccb8a9ca3afdde5eddbb
Submitter: Jenkins
Branch: master

commit 7fe95de20ccdfa5aa523ccb8a9ca3afdde5eddbb
Author: Ihar Hrachyshka <email address hidden>
Date: Thu Jan 16 18:22:49 2014 +0100

    Qpid: advance thru the list of brokers on reconnect

    In Qpid implementation, when using multiple qpid_hosts, we don't want to
    immediately retry failed connection for the same failed broker. This was not
    the case in existing implementation though, where we've always attempted to
    reconnect starting from the first broker in the list of candidates. So if the
    first broker failed, we initiated reconnect to the same failed broker.

    This change makes reconnect() implementation to select the next broker in the
    list. This also means that non-failure reconnect attempts will also switch the
    current broker. All in all, users should not rely on any particular order to
    use brokers from the list, so this should not constitute an issue.

    This is a backport of the following changes from oslo.messaging:
    * I257c2ad6d7ebead356c0239134340975da6dbc07 (code change)
    * I32e20c0e747e6489dab4b0358d422b8a9c6b982e (unit test).

    Change-Id: Ia148baa6e1ec632789ac3621c85173c2c16f3918
    Partial-Bug: 1261631