Ask other node for LedgerStatus

def _ask_for_ledger_status(self, node_name: str, ledger_id):
        """
        Ask other node for LedgerStatus
        """
        self.request_msg(LEDGER_STATUS, {f.LEDGER_ID.nm: ledger_id},
                         [node_name, ])
        logger.info("{} asking {} for ledger status of ledger {}".format(self, node_name, ledger_id))