Correct some config option underscores in example opentsdb.conf
Correct some config option underscores in example opentsdb.conf

OpenTSDB/opentsdb,alienth/opentsdb,MadDogTechnology/opentsdb,OpenTSDB/opentsdb,MadDogTechnology/opentsdb,alienth/opentsdb,OpenTSDB/opentsdb,MadDogTechnology/opentsdb