Fixed issue with duplicated metrics
Fixed issue with duplicated metrics

bruceauyeung/heapster,liubog2008/heapster,piosz/heapster,luxas/heapster,krzyzacy/heapster,taimir/heapster,mwringe/heapster,aegixx/heapster,mwringe/heapster,whuwxl/heapster,johanneswuerbach/heapster,saiwl/heapster,aegixx/heapster,huangyuqi/heapster,liubog2008/heapster,bruceauyeung/heapster,titilambert/heapster,luxas/heapster,taimir/heapster,huangyuqi/heapster,krzyzacy/heapster,Stackdriver/heapster,andyxning/heapster,whuwxl/heapster,jackzampolin/heapster,Stackdriver/heapster,burmanm/heapster,andyxning/heapster,AlmogBaku/heapster,titilambert/heapster,adfin/statster,burmanm/heapster,johanneswuerbach/heapster,AlmogBaku/heapster,saiwl/heapster,shilpamayanna/heapster,shilpamayanna/heapster,bluebreezecf/heapster,jackzampolin/heapster,piosz/heapster,adfin/statster,bluebreezecf/heapster