heartbeat is not stopped

[KopiasCsaba]

It seems, that upon closing up the rmq connection, a goroutine is leaked.

The reason seems to be, that there is nothing to stop the heartbeat if the queues and the client itself is closed.

There is a stopHeartbeat() method but it is private.

[wellle]

True. We should probably add a mechanism so once the closed connection is done with all pending internal work it would stop its own heartbeat.

[abarbalat]

In addition to leaked goroutine, its seems that we need to leak error channel, other wise it can panic, killing the process.