DirectConsumer needs rabbitmq mirrored queue support

[Kei Masumoto]

There are mainly 3 type of queues in impl_kombu. Topic, Direct Fanout. For Topic and Fanout consumer, we can use rabbitmq mirrored queue support, but not for DirectQueue.

I think there are no reason Mirrored queue can be used fot Topic and Fanout, but not Direct.
We should add mirrored queue option to direct consumer, otherwiser, message may be lost when rabbitmq is down suddenly.

This discussion was originally occured at<https://review.openstack.org/#/c/20240/>, and a conclusion is that it's an oversight.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/21880

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/21880
Committed: http://github.com/openstack/oslo-incubator/commit/568e533c3accb15d01bf6a8ebbf600a68b920916
Submitter: Jenkins
Branch: master

commit 568e533c3accb15d01bf6a8ebbf600a68b920916
Author: Kei Masumoto <email address hidden>
Date: Wed Feb 13 23:20:26 2013 +0900

    Fix "DirectConsumer needs mirrored queue support"

    Currently TopicCosumer and FanoutConsumer can be used
    Mirrored Queue support, but not DirectConsumer.
    This patch fix this issue.

    Fix bug 1124162

    Change-Id: I68ae23467ae810ce0ec917a4cb34a488283f401c