Added mongo service mode to not return results - use to get just a count, etc.
Added mongo service mode to not return results - use to get just a count, etc.

Kitware/tangelo,aashish24/tangelo,aashish24/tangelo,ecohealthalliance/tangelo,aashish24/tangelo,ecohealthalliance/tangelo,mathstuf/tangelo,Kitware/tangelo,mathstuf/tangelo,mathstuf/tangelo,Kitware/tangelo,ecohealthalliance/tangelo