Cleanup unused init, env configs and yml files

[gingerwizard]

The rpm and deb packages install an elasticsearch.yml, env default file (e.g. /etc/sysconfig/elasticsearch) init script and systemd file. These are not used as the role creates its own copy for each node instance - delimiting them with the mandatory instance name.
This ticket proposes cleaning these files up on completion of install.

[gingerwizard]

Needs to clean up systemd scripts.

[gingerwizard]

Next release.

[gingerwizard]

In 0.1.0 release on pull request 55