This commit complements blivet's
c35aafe4b27318faee52b5a0ea44ca9a6fd4a1ec because RHEL7 doesn't support
working with HFS+ partitions.
The HW boots just fine with VFAT EFI system partition. The downside of
using VFAT is that there aren't pretty menus, but I prefer no menus but
working system over non-working system each time.
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To view this pull request on github, visit
https://github.com/rhinstaller/anaconda/pull/101