improve consume() timing test by ensuring that the actual time was at least within 1s of the expected timeout
improve consume() timing test by ensuring that the actual time was at least within 1s of the expected timeout

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