Increase the limit on the maximum length of Y/Y2 range fields.
Increase the limit on the maximum length of Y/Y2 range fields.

This closes #19.

Change-Id: I1fe859e4c9d50bf72ef230dd277ad225c75f2966

johann8384/opentsdb,OpenTSDB/opentsdb,MadDogTechnology/opentsdb,ShefronYudy/opentsdb,alienth/opentsdb,MadDogTechnology/opentsdb,eswdd/opentsdb,sidhhu/opentsdb,kidaa/opentsdb,OpenTSDB/opentsdb,ShefronYudy/opentsdb,eswdd/opentsdb,andyflury/opentsdb,kidaa/opentsdb,MadDogTechnology/opentsdb,alienth/opentsdb,andyflury/opentsdb,sidhhu/opentsdb,OpenTSDB/opentsdb,johann8384/opentsdb