* etc/nagios/nrpe.d/celery.cfg: new NRPE config for celery check
* etc/nagios/nrpe.d/rabbitmq.cfg: add a NRPE check for RabbitMQ queue consumers
* etc/sudoers.d/nagios-plugins-cyb: add a sudo permission for
  check_rabbitmq_queue_consumers
* renamed plugins/check_rabbit_queue_consumers in plugins/check_rabbitmq_queue_consumers