Group Layers - update scene service urls (#418)

* update service URLs and variable names for clarity

* update screenshot

* update variable names

* update grouping to match implementation details

Author: JonLavi

group_layers/group-layers/GroupLayers.png

@@ -76,19 +76,19 @@ public void start(Stage stage) {
       scene.setBaseSurface(surface);
 
       // create different types of layers
-      ArcGISSceneLayer devOne = new ArcGISSceneLayer("https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Trees/SceneServer/layers/0");
-      ArcGISSceneLayer devTwo = new ArcGISSceneLayer("https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_Pathways/SceneServer/layers/0");
-      ArcGISSceneLayer devThree = new ArcGISSceneLayer("https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/DevA_BuildingShell_Textured/SceneServer/layers/0");
-      ArcGISSceneLayer nonDevOne = new ArcGISSceneLayer("https://scenesampleserverdev.arcgis.com/arcgis/rest/services/Hosted/PlannedDemo_BuildingShell/SceneServer/layers/0");
-      FeatureLayer nonDevTwo = new FeatureLayer(new ServiceFeatureTable("https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/DevelopmentProjectArea/FeatureServer/0"));
+      ArcGISSceneLayer devABuildings = new ArcGISSceneLayer("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/DevA_BuildingShells/SceneServer");
+      ArcGISSceneLayer devBBuildings = new ArcGISSceneLayer("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/DevB_BuildingShells/SceneServer");
+      ArcGISSceneLayer devATrees = new ArcGISSceneLayer("https://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/DevA_Trees/SceneServer");
+      FeatureLayer devAPathways = new FeatureLayer(new ServiceFeatureTable(" https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/DevA_Pathways/FeatureServer/1"));
+      FeatureLayer devProjectArea = new FeatureLayer(new ServiceFeatureTable("https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/DevelopmentProjectArea/FeatureServer/0"));
 
       // create a group layer from scratch by adding the layers as children
       GroupLayer groupLayer = new GroupLayer();
       groupLayer.setName("Group: Dev A");
-      groupLayer.getLayers().addAll(Arrays.asList(devOne, devTwo, devThree));
+      groupLayer.getLayers().addAll(Arrays.asList(devATrees, devAPathways, devABuildings));
 
       // add the group layer and other layers to the scene as operational layers
-      scene.getOperationalLayers().addAll(Arrays.asList(groupLayer, nonDevOne, nonDevTwo));
+      scene.getOperationalLayers().addAll(Arrays.asList(groupLayer, devBBuildings, devProjectArea));
 
       // zoom to the extent of the group layer when the child layers are loaded
       groupLayer.getLayers().forEach(childLayer ->