Tidy up inventory and vars files having hosts info (IP, hostnames, etc)

[fracappa]

Hello everyone.

I want to report that I found confusing information on the various inventory/var files.
This could be due to different way of implementing playbooks by different involved people.

We have both information on local nodes and remote nodes (used for remote connections, like Liqo peering) which should not be coexisting within the inventory file: this is the host lists describing only the target machines (the ones to be configured).

Additionally, info regarding remote nodes (still used for remote connections) are also reported inside the vars file which follows the Ansible best practices.

I believe that we should organize the scripts to make them cleaner.

Looking forward for any feedback.

Thanks,
Francesco