Fix shellcheck lint errors in test/images/volume/gluster/run_gluster.sh

hack/.shellcheck_failures

@@ -86,6 +86,5 @@
 ./test/e2e_node/environment/setup_host.sh
 ./test/e2e_node/gubernator.sh
 ./test/images/image-util.sh
-./test/images/volume/gluster/run_gluster.sh
 ./test/images/volume/iscsi/create_block.sh
 ./test/images/volume/nfs/run_nfs.sh

test/images/volume/gluster/run_gluster.sh

@@ -14,24 +14,24 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-DIR=`mktemp -d`
+DIR="$(mktemp -d)"
 
 function start()
 {
-    mount -t tmpfs test $DIR
-    chmod 755 $DIR
-    cp /vol/* $DIR/
+    mount -t tmpfs test "$DIR"
+    chmod 755 "$DIR"
+    cp /vol/* "$DIR/"
     /usr/sbin/glusterd -p /run/glusterd.pid
-    gluster volume create test_vol `hostname -i`:$DIR force
+    gluster volume create test_vol "$(hostname -i):$DIR" force
     gluster volume start test_vol
 }
 
 function stop()
 {
     gluster --mode=script volume stop test_vol force
-    kill $(cat /run/glusterd.pid)
-    umount $DIR
-    rm -rf $DIR
+    kill "$(cat /run/glusterd.pid)"
+    umount "$DIR"
+    rm -rf "$DIR"
     exit 0
 }