When an operator rely on rabbitmq policies, there is no point to set the
queue TTL in config.
Moreover, using policies is much more simpler as you dont need to
delete/recreate the queues to apply the new parameter (see [1]).
So, adding the possibility to set the transient queue TTL to 0 will
allow the creation of the queue without the x-expire parameter and only
the policy will apply.
[1] https://www.rabbitmq.com/parameters.html#policies
Related-bug: #2031497
Signed-off-by: Arnaud Morin <arnaud.morin@ovhcloud.com>
Change-Id: I34bad0f6d8ace475c48839adc68a023dd0c380de