rabbitmq: Run rabbitmq cookbook after rabbitmq attributes are modified

If I understand the rabbitmq recipe correctly, the `if node.sensu.use_ssl ...` block is completely ignored by the precedent `include_recipe "rabbitmq"`. It makes `ssl_cacert`, `ssl_cert` and `ssl_key` in `/etc/rabbitmq/rabbitmq.config` to be the unreasonable default like `/path/to/cacert.pem`.

This patch moves the `include_recipe`s after the `if` block so that `rabbitmq` cookbook can use the overridden attributes.