Recommended update for yast2-tune

This update for yast2-tune fixes the following issues:

- Add I/O device autoconfig checkbox on s390 for installer pre-configuration. (bsc#1168036)
- Remove elevator settings kernel boot parameter as it is obsolte. (bsc#1178797)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Fixed bugs
bnc#1168036
[15sp2 FEAT] I/O device pre-configuration - installer part (yast and linuxrc and installation-images-SLES)
bnc#1178797
YaST2 still rely on elevator kernel boot parameter which is obsoleted
Selected Binaries
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