Updated openstack/openstack
Project: openstack/oslo.messaging  aa2d689f97fec9cf93f1b333dab5bd6cfda4d0e5
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Add Sample priority

With the routing notifier we can now issue high-frequency notifications
and not worry about clogging up the queue. The Sample priority will
be used for this situation.

Change-Id: Ia4aa77b7aa4ca9458e97ca3ed81101d92934b691