Fix some tests and disable the snappy test.
Fix some tests and disable the snappy test.

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