Foreman Maintain

Fixes #19496 - procedure passenger-recycler

bin/passenger-recycler: comply with rubocop standard

Fixes #19496 - added passenger recycler

Updated default location for looking up foreman_maintain config
file. New location (/etc/foreman-maintain/foreman_maintain.yml) is
less deep than earlier location.

Newly added config constants for packaging.

Tests for preparation steps

Hammer setup preparation step

Fixes #18 - introduce configuration file

Fix executable

tests for health commands

CLI basic structure