In I83a8d09dc0cdae24c12d7043ec810529a9ce57ab, we
made reply and fanout queues expire instead of auto-delete
and set the rabbit_transient_queues_ttl to 10 mins.
In grenade, we seem to see the queues expiring just around
the time the new side is coming up which causes havoc. There
is no reason the rabbit_transient_queues_ttl should not be
higher. So let's bump up the expiry to 30 mins.
Closes-Bug: #1545002
Change-Id: I70a29b762198129fe0a3e904d9f2a7d4242b322c