Add payload rpc interface
Add payload rpc interface

BaiGang/taskgraph,fengjingchao/taskgraph,plutoshe/mapreduceOfTaskgraph,go-distributed/meritop,dzch/taskgraph,taskgraph/taskgraph,fengjingchao/taskgraph,BaiGang/taskgraph,kod3r/taskgraph,5kg/taskgraph,kod3r/taskgraph,plutoshe/taskgraph,taskgraph/taskgraph,dzch/taskgraph,go-distributed/meritop,5kg/taskgraph,plutoshe/mapreduceOfTaskgraph,plutoshe/taskgraph