Update afterburn to version 5.0.0 / rev 4 via SR 906250
    
    https://build.opensuse.org/request/show/906250
    by user sayalilunkad + dimstar_suse
    - Forward port fix-authorized-keys-location.patch
    - Add set-default-user.patch
      + Set the default user to suse
    - Add fix-authorized-keys-location.patch
      + Write the ssh keys to the standard location
    - Add no-network-args.patch
      + Networks arguments on the kernel command line are set during image build
        there is no need for another place for a hard coded list.
    - Create target dir for afterburn to write configuration file to