these rarely get used any more. they're only used when we're
running the filesystem tests on a non-Server image, where the
default fs is ext4 not xfs. With the old nightly process, where
we only got a generic boot.iso, we used them all the time, but
now we get product-ized nightlies, we rarely do. But I did hit
them today running the universal tests with a generic boot.iso
I hand-built to test an anaconda update, so in case we need to
do that kind of thing again in future, we may as well update
the needles.
