Add test for the application of message-ttl policy retroactively #1425
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Tests the behavior of the queues when a
message-ttl
policy is applied retroactively.At the moment, if there are messages in the queue when the policy is applied, these messages aren't drained after the
ttl
. However, the documentation (https://www.rabbitmq.com/ttl.html#per-message-ttl-caveats) states that they are drained when they reach the head of the queue, and aren't delivered to consumers.Expire those messages is complex, as the timestamp when they entered the queue is missing. Current behaviour could be accepted, and only a documentation update required.