Hello,

I am submitting this issue for compatibility of template RabbitMQ cluster & node.

In the template [readme](https://www.zabbix.com/integrations/rabbitmq) you indicate `In the case of a single-node installation, you can assign the cluster template to one host with a node template.` which for me translate by "you can assign both template cluster & node on the same host in zabbix", however, it seems the 2 templates use the same keys for discovery:

`rabbitmq.healthcheck.v3810.discovery`

Which generate conflict when assigning the template. I would suggest, considering the items in the 2 discoveries are "similar" but "different" (but still similar :O) to either update the documentation to confirm the correct usage or rename one of the discovery to correspond to the target template, ex: `rabbitmq.cluster.healthcheck.v3810.discovery`

Best regards