- fixed gfxmode/gfxpayload setup in kiwi grub2 setup
  * it's possible to set vga="0x<kernel-vesa-mode" in the kiwi
    XML description. If grub2 was used as bootloader the information
    was incorrectly transfered into gfxmode and gfxpayload values
    in the grub.cfg. In addition the values were not handed over
    to the initrd and the file /etc/default/grub. All this is
    fixed now