Node facts not generated when Elasticsearch in cluster mode

[jameskirsop]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 6.x
• Module version: 8.0.0

How to reproduce (e.g Puppet code you use)

Set your config for network.host to _site_.

What are you seeing

The fact generation is hardcoded to reach the API on localhost, which won't work when you're using _site_ configuration to allow for discovery and clustering because it'll (likely) be running on an IP address that's not locally bound.