add heartbeat, not tested yet.

lichao

2021-04-09 4e5cb7960ce4e7e66d5190be67426aeca8b55c3d

 utest/util.h

@@ -114,11 +114,11 @@
       TopicNode(shm), id_(id) { Init(); }
   void Init()
   {
      MsgRegister reg;
      reg.mutable_proc()->set_proc_id(id_);
      ProcInfo proc;
      proc.set_proc_id(id_);
      MsgCommonReply reply_body;

      if (!Register(reg, reply_body, 1000)) {
      if (!Register(proc, reply_body, 1000)) {
         printf("node %s register failed\n", id_.c_str());
      }
   }