set next_offset in OwnedPartition __init__
set next_offset in OwnedPartition __init__

benauthor/pykafka,benauthor/pykafka,thedrow/samsa,thedrow/samsa,benauthor/pykafka,fortime/pykafka,yungchin/pykafka,aeroevan/pykafka,jofusa/pykafka,wikimedia/operations-debs-python-pykafka,sontek/pykafka,jofusa/pykafka,wikimedia/operations-debs-python-pykafka,wikimedia/operations-debs-python-pykafka,sammerry/pykafka,vortec/pykafka,sammerry/pykafka,fortime/pykafka,thedrow/samsa,vortec/pykafka,yungchin/pykafka,appsoma/pykafka,tempbottle/pykafka,appsoma/pykafka,aeroevan/pykafka,sontek/pykafka,tempbottle/pykafka