BIG change, join center,bus; now msg is head+body.

lichao

2021-04-08 c338820e4db43ad32c20ff429a038b06bcb980f8

 proto/source/error_msg.proto

@@ -8,6 +8,11 @@
    eSuccess = 0;
    eError = 1;
    eInvalidInput = 2;
    eNotRegistered = 3;
    eNotFound = 4;
    eOffline = 5;
    eNoRespond = 6;
    eAddressNotMatch = 7;
}

message ErrorMsg {