Update for 389-ds, 389-ds.13576, 389-ds.13883, A... recommended important

Recommended update for grub2

This update for grub2 fixes the following issues:

- The GRUB_VERIFY_FLAGS_DEFER_AUTH is enabled regardless secure boot status (bsc#1175766)

A secure boot status check has been added before requesting other verifiers to verify external module,
therefore external module loading can work after shim_lock module is loaded and secure boot turned off.

- Make consistent check to enable relative path on btrfs (bsc#1174567)

This fix unified the test in grub-install and grub-mkconfig.
The path to default or selected btrfs subvolume/snapshot is used if the root file system is
btrfs and the config has enabled btrfs snapshot booting.

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

Fixed bugs
grub2 fails to boot on UEFI: verification requested but nobody cares
GRUB2 cannot detect my kernel location anymore.
Selected Binaries