Configure logging
    The function configures log messages. By default, log messages
    are sent to stderr. Set the parameter `debug` to activate the
    debug mode.
    :param debug: set the debug mode

def configure_logging(info=False, debug=False):
    """Configure logging
    The function configures log messages. By default, log messages
    are sent to stderr. Set the parameter `debug` to activate the
    debug mode.
    :param debug: set the debug mode
    """
    if info:
        logging.basicConfig(level=logging.INFO,
                            format=LOG_FORMAT)
        logging.getLogger('requests').setLevel(logging.WARNING)
        logging.getLogger('urrlib3').setLevel(logging.WARNING)
        logging.getLogger('elasticsearch').setLevel(logging.WARNING)
    elif debug:
        logging.basicConfig(level=logging.DEBUG,
                            format=DEBUG_LOG_FORMAT)
    else:
        logging.basicConfig(level=logging.WARNING,
                            format=LOG_FORMAT)
        logging.getLogger('requests').setLevel(logging.WARNING)
        logging.getLogger('urrlib3').setLevel(logging.WARNING)
        logging.getLogger('elasticsearch').setLevel(logging.WARNING)