Recreate missing backingFsBlockDev on setting xfs project quota
Recreate missing backingFsBlockDev on setting xfs project quota

There is the rare case that something removed the backingFsBlockDev,
which usually points to
`/var/lib/containers/storage/overlay/backingFsBlockDev`. In that case,
all `SetQuota` operations would fail on overlay layer creation.

We now work around that error by recreating the backingFsBlockDev.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@redhat.com>

containers/storage,containers/storage,containers/storage