Add unique id, type and hostname

def _structlog_default_keys_processor(logger_class, log_method, event):
    ''' Add unique id, type and hostname '''
    global HOSTNAME

    if 'id' not in event:
        event['id'] = '%s_%s' % (
            datetime.utcnow().strftime('%Y%m%dT%H%M%S'),
            uuid.uuid1().hex
        )

    if 'type' not in event:
        event['type'] = 'log'

    event['host'] = HOSTNAME

    return event