fix rescue system (bnc #841695)
change terminal to ibm3270
fix yast2 theme handling in openSUSE
add sysconfig-netconfig to initrd (bnc #867078)
add sg3_utils to initrd (bnc #866933)
Put grub2 on ppc media

This is finall set of changes to put grub2 on ppc media

Signed-off-by: Dinar Valeev <dvaleev@suse.com>