fix the tests.
fix the tests.

resolves #18

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