Due to a problematic bug in Glance (https://bugs.launchpad.net/glance/+bug/1074132),
I was unable to get stack.sh to complete successfully. The workaround on the
Glance bug was to set the rabbit_durable_queues value to match the setting
of the local Rabbit consumers and exchanges.
This patch merely looks for any consumer or exchange that
is durable and ensures that the default durable_rabbit_queues
config option of False is set to True in that case.
Change-Id: Ia5a165a5a06d11d1fe6492ca32139972d49d3a1e