Fix errors in cephfs_test.go

pkg/volume/cephfs/cephfs_test.go

@@ -85,9 +85,8 @@ func TestPlugin(t *testing.T) {
 		t.Errorf("Got a nil Mounter")
 	}
 	volpath := path.Join(tmpDir, "pods/poduid/volumes/kubernetes.io~cephfs/vol1")
-	path := mounter.GetPath()
-	if path != volpath {
-		t.Errorf("Got unexpected path: %s", path)
+	if volumePath != volpath {
+		t.Errorf("Got unexpected path: %s", volumePath)
 	}
 	if err := mounter.SetUp(nil); err != nil {
 		t.Errorf("Expected success, got: %v", err)