message: Refine the client-server version mismatch error message.
diff: @@ -313,8 +313,9 @@ Status EagerServiceImpl::ExecuteOp(const Operation& operation,
  "' is neither a type of a primitive operation nor a name "
  "of a function registered in binary running on ",
  port::Hostname(),
  - ". Make sure the operation or function is "
  - "registered in the binary running in this process.");
  + ". One possible root cause is the client and server binaries are not "
  + "built with the same version. Please make sure the operation or "
  + "function is registered in the binary running in this process.");
  }
  op.reset(new tensorflow::EagerOperation(eager_context, name, is_function,
  types, eager_executor));
  