Complex filesystem layout does not get detected and configured correct.

[Martin-Weiss]

We have LVM with EXT4 and /usr on separate LVM partition. In this case there are multiple problems:

1) insmod ext4 in grub.cfg -> there is no ext4 module and we have to use ext2 module (fixed by manually adjusting grub.cfg and replacing ext4 with ext2)

2) no lvm module loaded (fixed 1 manually) (manually fixed by adding insmod lvm)

3) even with the manual fix for the above two - the service does not start:

so we copied the iso to / and rebooted

4)

5) this is the disk layout we have:

[rjschwei]

covered in bsc#1180712

The ext4 issue is already fixed commit 328fceb8d3405f

[schaefi]

The LVM issue is now also fixed with #192 and #195