- eliminate the getUsers_legacy method
- removed __checkNoProfsBootstrapPackages check. It's allowed
  to have profiles specified in the bootstrap packages. There
  are image descriptions which installs the entire system by
  bootstrap packages. Reason for this is if the packagemanager
  in the image is not compatible to the implementation in kiwi
  e.g SLE10. Other than that we officially support bootstrap
  only installation including all features of 'image' typed
  package sections.