switch the settings to use systemd tools

- use the localectl and datetimectl implementations provided by
  systemd to set the configuration
  + short circuit the suseConfig function in the shell code
    if localectl exists
 + implement the configuration in Perl code, now all configuration
   settings are implemented in the same class
 + remove the call to suseConfig in the config.sh files of our examples
- clean up the KIWIConfigure implementation to critic level 3
- add deprecation message to the old implementation