fstests: fix broken _require_scratch usage

_require_scratch doesn't actually format the scratch device with
anything, which means that tests are required to format them before
using them.  Fix tests that don't do this correctly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

tests/generic/026

@@ -32,7 +32,6 @@ _cleanup()
 _supported_fs generic
 _supported_os Linux
 _require_test
-_require_scratch
 _acl_setup_ids
 _require_acls
 _require_acl_get_max

tests/generic/100

@@ -52,9 +52,6 @@ _populate_fs -n $NDIRS -f $NFILES -d $DEPTH -r $POPULATED_DIR -s $SIZE >>$seqres
 # Then tar up the directory structure
 tar -cvf $TEMP_DIR/$TAR_FILE $POPULATED_DIR >>$seqres.full 2>&1
 
-# create f/s
-_require_scratch
-
 # untar on f/s
 cd $TEST_DIR
 tar -xvf $TEMP_DIR/$TAR_FILE >>$seqres.full 2>&1

tests/generic/506

@@ -46,12 +46,12 @@ _supported_os Linux
 _require_command "$LSATTR_PROG" lsattr
 _require_command "$CHATTR_PROG" chattr
 
-_require_prjquota $SCRATCH_DEV
 _require_scratch
 _require_scratch_shutdown
 
 _scratch_mkfs >/dev/null 2>&1
 _require_metadata_journaling $SCRATCH_DEV
+_require_prjquota $SCRATCH_DEV
 
 testfile=$SCRATCH_MNT/testfile