- deactivate the use of lxc to run custom scripts (bnc #845617)
  * some tools e.g groupadd requires access to subsystems like PAM
    which did not work inside the lxc container because the required
    precondititions were not added while starting the container.
    Thus only simple scripts not accessing PAM, udev and other
    subsystems will work. In addition to that the environment the
    lxc container itself is started often does not provide the
    required subsystems e.g support for cgroups. All in all there
    are more problems than solutions with this concept which is
    the reason why I disable it for now