Recommended update for dracut

This update for dracut provides the following fixes and improvements.

- Always install dm-snaphost module if lvm dracut module is needed, even if dm-snampshot is not loaded on the host yet (bsc#947518)
- Revert 0176-Parse-rootflags-correctly.patch (bsc#940100)
+ The patch caused a regression and added quite some complexity. The bug (912734) which got fixed by the reverted patch is solved via documentation TID for now. It is worked (mainline/factory) for a proper solution which might get added later when properly tested.

Fixed bugs
bnc#940100
L3: guest does not boot if /boot is on a separate partition with the latest dracut
bnc#947518
On a system with LVM mkinitrd omits dm-snapshot module causing possible unbootable system
Selected Binaries
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