Split "connectionmgr.connections" stat into "type=open" as a guange showing the number of open connections and "type=total" to show the total number of connection since start.
Split "connectionmgr.connections" stat into "type=open" as a guange showing the
number of open connections and "type=total" to show the total number of
connection since start.

Signed-off-by: Chris Larsen <83037b211e1d109d6858769a113e269c3139ffd3@euphoriaaudio.com>

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