add_fields

        :param log_record: log record
        :param record: log message
        :param message_dict: message dict

def add_fields(
            self,
            log_record,
            record,
            message_dict):
        """add_fields

        :param log_record: log record
        :param record: log message
        :param message_dict: message dict
        """
        super(
            SplunkFormatter,
            self).add_fields(
                log_record,
                record,
                message_dict)
        if not log_record.get('timestamp'):
            now = datetime.datetime.utcnow().strftime(
                '%Y-%m-%dT%H:%M:%S.%fZ')
            log_record['timestamp'] = now