Configures the first serial port to allow a serial console connection.

def _set_serial_console(self):
        """
        Configures the first serial port to allow a serial console connection.
        """

        pipe_name = self._get_pipe_name()
        serial_port = {"serial0.present": "TRUE",
                       "serial0.filetype": "pipe",
                       "serial0.filename": pipe_name,
                       "serial0.pipe.endpoint": "server",
                       "serial0.startconnected": "TRUE"}
        self._vmx_pairs.update(serial_port)