Removed ruby 1.8.7 from travis
Removed ruby 1.8.7 from travis

mxenabled/logstasher,jphelps413/logstasher,shadabahmed/logstasher,jdurand/logstasher,roolo/logstasher,ministryofjustice/logstasher,alexdean/logstasher,rockaBe/logstasher,reevoo/logstasher,moneydesktop/logstasher,MarcGrimme/logstasher