Fixes #3925 - Prevent UUID to be removed
Fixes #3925 - Add script to check UUID of Rudder and CFEngine process, and set 'root' to UUID only during rudder-server-root install but use the script during upgrade
Refs #3925 - Add GPLv3 License to new script
Refs #3925 - Fix typos and change name check_rudder-ganet to check-rudder-agent
Refs #3925 - Remove changes and add comments on rudder-server-root package, Add temporary cron set into rudder-agent postinst and comments for check-rudder-agent
#Refs #3925 - Add comments in rudder-agent postinst
Refs #3925 - Fix wrong files and bizarre logics