The Oslo.messaging project implemented a nice feature called Queue
Manager. This means that instead of using random queue names in
RabbitMQ, it uses queue names composed of hostname, process-name and a
counter. For proper functioning, the code stores some informations in
/dev/shm. This is needed to avoid creating queues with the same name.
We'd otherwise hit this where multiple services run under mod_wsgi, or
with services such as Magnum just within a single container as it needs
to create multiple "reply" queues.
This patch mounts /dev/shm in containers where oslo_messaging is used.
This is enabled when ``om_enable_queue_manager`` is set to ``True``.
Queue Manager will be supported in a follow-up patch.
Change-Id: Ib85ce252374fae917d329e1824800a288c6bc9f1
3a8bfc0ace