Add three tests for verifying compatibility with xfsdump format 2.
Test 281 generates a format 2 dump and restores it.
Test 282 does a restore of a level 0 dump in the old dump format
followed by a restore of a level 1 dump in the current dump format.
Test 283 does a restore of a level 0 dump in the current dump format
followed by a restore of a level 1 dump in the old dump format.
Signed-off-by: Bill Kendall <wkendall@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Bill Kendall