[PATCH] xfstests: exit out if _scratch_mount fails

[Ben Myers]

Hey Josef,

On Tue, Jul 09, 2013 at 03:07:27PM -0400, Josef Bacik wrote:
> I test some of the different mkfs options for btrfs, one set doesn't work
> properly with small file systems, so the fs won't mount.  This is fine from a
> btrfs point of view, but tests that fail to mount the scratch fs will run
> anyway, so if it's a "fill the fs" sort of test this will wreak havoc.  To fix
> this just error out of _scratch_mount fails.  Thanks,
> 
> Signed-off-by: Josef Bacik <jbacik at fusionio.com>

I noticed that this change causes dmapi tests to try to be run on systems that
don't have dmapi supported, and they fail.  Have you seen this?

Thanks,
	Ben