xfstests: remove fio config files after finished test

After finished test, temporarily fio config file should be removed.
This commit tries to fix this problem in the following test cases:
  - generic/299-300
  - ext4/301-304
  - shared/305

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>

tests/shared/305

@@ -29,6 +29,7 @@ echo "QA output created by $seq"
 
 here=`pwd`
 tmp=/tmp/$$
+fio_config=$tmp.fio
 status=1	# failure is the default!
 
 # get standard environment, filters and checks
@@ -79,6 +80,7 @@ _cleanup()
 {
     poweron_scratch_dev
     disallow_fail_make_request
+    rm -f $tmp.*
 }
 trap "_cleanup; exit \$status" 1 2 3 15
 
@@ -87,7 +89,7 @@ NUM_JOBS=$((4*LOAD_FACTOR))
 BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV`
 FILE_SIZE=$((BLK_DEV_SIZE * 512))
 
-cat >$tmp-$seq.fio <<EOF
+cat >$fio_config <<EOF
 ###########
 # $seq test's fio activity
 # Filenames derived from jobsname and jobid like follows:
@@ -127,7 +129,7 @@ time_based
 
 EOF
 
-_require_fio $tmp-$seq.fio
+_require_fio $fio_config
 
 # Disable all sync operations to get higher load
 FSSTRESS_AVOID="$FSSTRESS_AVOID -ffsync=0 -fsync=0 -ffdatasync=0 -f setattr=1"
@@ -143,8 +145,8 @@ _workout()
 	$FSSTRESS_PROG $args > /dev/null 2>&1 &
 	fs_pid=$!
 	echo "Start fio.."
-	cat $tmp-$seq.fio >>  $seqres.full
-	$FIO_PROG $tmp-$seq.fio >> $seqres.full 2>&1 &
+	cat $fio_config >>  $seqres.full
+	$FIO_PROG $fio_config >> $seqres.full 2>&1 &
 	fio_pid=$!
 
 	# Let's it work for awhile, and force device failure