Handle query grouping in graphite backend.
Handle query grouping in graphite backend.

facette/facette,hirocaster/facette,facette/facette,psytra/facette,iaean/facette,vovkasm/facette,facette/facette,vovkasm/facette,Skrupellos/facette,yonglehou/facette,hirocaster/facette,Skrupellos/facette,yonglehou/facette,githubert/facette,githubert/facette,facette/facette,hirocaster/facette,iaean/facette,psytra/facette,Skrupellos/facette,yonglehou/facette,psytra/facette,iaean/facette,vovkasm/facette,githubert/facette