fstests: filter redundant output by getfattr

When getfattr dumps values of all extended attributes (-d option),
it doesn't print empty extended attributes. e.g: user.name. But from
attr-2.4.48 this behavior is changed,  new getfattr prints
user.name="".

The {=""} will break the golden image, so filter the redundant =""
at the end if it has.

Signed-off-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

tests/xfs/021

@@ -41,9 +41,9 @@ _attr()
 	return $exit
 }
 
-_getfattr()
+do_getfattr()
 {
-	${GETFATTR_PROG} $* 2>$tmp.err >$tmp.out
+	_getfattr $* 2>$tmp.err >$tmp.out
 	exit=$?
 	sed \
 	    -e "s#$SCRATCH_MNT[^ .:]*#<TESTFILE>#g" \
@@ -79,7 +79,7 @@ echo "*** make test file 1"
 touch $testfile.1
 echo "v1" | _attr -s "a1" $testfile.1 >/dev/null
 echo "v2--" | _attr -s "a2--" $testfile.1 >/dev/null
-_getfattr --absolute-names $testfile.1
+do_getfattr --absolute-names $testfile.1
 inum_1=`ls -li $testfile.1 | $AWK_PROG '{ print $1 }'`
 
 echo "*** make test file 2"
@@ -89,7 +89,7 @@ echo "value_1" | _attr -s "a1" $testfile.2 >/dev/null
 echo "value_2" | _attr -s "a2-----" $testfile.2 >/dev/null
 ( echo start; POSIXLY_CORRECT=yes dd if=/dev/zero bs=65525 count=1; echo end )\
 	| _attr -s "a3" $testfile.2 >/dev/null
-_getfattr --absolute-names $testfile.2
+do_getfattr --absolute-names $testfile.2
 
 # print name and size from 1st line of output
 _attr -g "a3" $testfile.2 > $tmp.hahahahaplonk

tests/xfs/187

@@ -105,7 +105,7 @@ _scratch_mount -o noattr2
 cd $SCRATCH_MNT
 touch testfile
 $SETFATTR_PROG -n user.test -v 0xbabe testfile
-$GETFATTR_PROG testfile
+_getfattr testfile
 cd $here
 $UMOUNT_PROG $SCRATCH_MNT
 _scratch_xfs_db -r -c version 2>&1 | _filter_version