Fixes #4026 - Move the configuration file /etc/logrotate.d/rudder-server-root to /etc/logrotate.d/rudder in Debian way

Fixes #4026 - Move the configuration file /etc/logrotate.d/rudder-server-root to /etc/logrotate.d/rudder in Debian way

See http://www.rudder-project.org/redmine/issues/4026