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* fn: hot container timer improvements With this change, now we are allocating the timers when the container starts and managing them via stop/clear as needed, which should not only be more efficient, but also easier to follow. For example, previously, if eject time out was set to 10 secs, this could have delayed idle timeout up to 10 secs as well. It is also not necessary to do any math for elapsed time. Now consumers avoid any requeuing when startDequeuer() is cancelled. This was triggering additional dequeue/requeue causing containers to wake up spuriously. Also in startDequeuer(), we no longer remove the item from the actual queue and leave this to acquire/eject, which side steps issues related with item landing in the channel, not consumed, etc.