correct the comments of interface Cache
correct the comments of interface Cache

liubog2008/heapster,adfin/statster,huangyuqi/heapster,shilpamayanna/heapster,taimir/heapster,johanneswuerbach/heapster,a-robinson/heapster,vicki-c/heapster,andyxning/heapster,krzyzacy/heapster,mwielgus/heapster,piosz/heapster,Huawei-PaaS/heapster,mwielgus/heapster,adfin/statster,vicki-c/heapster,skytap/heapster,bruceauyeung/heapster,bluebreezecf/heapster,jackzampolin/heapster,aegixx/heapster,wulonghui/heapster,mwringe/heapster,saiwl/heapster,krzyzacy/heapster,aegixx/heapster,whuwxl/heapster,burmanm/heapster,titilambert/heapster,huangyuqi/heapster,piosz/heapster,afein/heapster,burmanm/heapster,Stackdriver/heapster,luxas/heapster,skytap/heapster,Stackdriver/heapster,shilpamayanna/heapster,mwringe/heapster,AlmogBaku/heapster,bruceauyeung/heapster,andyxning/heapster,afein/heapster,jackzampolin/heapster,luxas/heapster,bluebreezecf/heapster,Huawei-PaaS/heapster,AlmogBaku/heapster,liubog2008/heapster,saiwl/heapster,whuwxl/heapster,wulonghui/heapster,johanneswuerbach/heapster,titilambert/heapster,a-robinson/heapster,taimir/heapster