Do not remove redis' keys if layergroup was not created

test/support/test-client.js

@@ -441,9 +441,16 @@ TestClient.prototype.getDataview = function(dataviewName, params, callback) {
             );
         },
         function finish(err, dataview) {
-            self.keysToDelete['map_cfg|' + LayergroupToken.parse(layergroupId).token] = 0;
-            self.keysToDelete['user:localhost:mapviews:global'] = 5;
-            return callback(err, dataview);
+            if (err) {
+                return callback(err);
+            }
+
+            if (layergroupId) {
+                self.keysToDelete['map_cfg|' + LayergroupToken.parse(layergroupId).token] = 0;
+                self.keysToDelete['user:localhost:mapviews:global'] = 5;
+            }
+
+            return callback(null, dataview);
         }
     );
 };