[PATCH][RESEND] xfstests: add a test for btrfs device replace operation

[Rich Johnston]

Thanks for the patch Stefan, it has been committed.

--Rich

commit 53b73199db79dcd58622aaac2e9b0f31073bfc44
Author: Stefan Behrens <sbehrens at giantdisaster.de>
Date:   Fri Aug 23 13:07:11 2013 +0000

     xfstests: add a test for btrfs device replace operation