only maintain one retry maximum, not two. send all retried messages to the very beginning of the pipeline
only maintain one retry maximum, not two. send all retried messages to the very beginning of the pipeline

benauthor/pykafka,thedrow/samsa,yungchin/pykafka,yungchin/pykafka,thedrow/samsa,benauthor/pykafka,wikimedia/operations-debs-python-pykafka,wikimedia/operations-debs-python-pykafka,thedrow/samsa,wikimedia/operations-debs-python-pykafka,benauthor/pykafka