tests: Fix failure in nojournal mode

Several tests use fs shutdown. Without journalling the filesystem isn't
guaranteed to be consistent after shutdown. So for tests that don't make
sure data makes it to the disk using fsync/sync we cannot really test
much. Skip such tests without journalling.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>