Use service name instead of localhost

[Natkeeran]

Claw-playbook and related roles use quite a number localhost as endpoints. When deploying to multiple machines, the user has to carefully configure the many places it appears. To help improve this, we can use service_name or host_name configured in /etc/hosts. Thus, instead of http://localhost:8080/fcrepo/rest, it can be http://fedora:8080/fcrepo/rest.

In addition to helping simplify configuration, it can later on help with making it more scalable/distributed as well. For instance, instead of the using hosts file for mapping, admins can setup DNS.

Make sure not to overwrite existing /etc/hosts, but to append the additional name machine mappings.

Additional Info:
https://unix.stackexchange.com/questions/16890/how-to-make-a-machine-accessible-from-the-lan-using-its-hostname