Start a telnet proxy for the console allowing multiple client
        connected at the same time

def start_wrap_console(self):
        """
        Start a telnet proxy for the console allowing multiple client
        connected at the same time
        """
        if not self._wrap_console or self._console_type != "telnet":
            return
        remaining_trial = 60
        while True:
            try:
                (reader, writer) = yield from asyncio.open_connection(host="127.0.0.1", port=self._internal_console_port)
                break
            except (OSError, ConnectionRefusedError) as e:
                if remaining_trial <= 0:
                    raise e
            yield from asyncio.sleep(0.1)
            remaining_trial -= 1
        yield from AsyncioTelnetServer.write_client_intro(writer, echo=True)
        server = AsyncioTelnetServer(reader=reader, writer=writer, binary=True, echo=True)
        self._wrapper_telnet_server = yield from asyncio.start_server(server.run, self._manager.port_manager.console_host, self.console)