fix(demo): update Flowing Code's coordinates on demos

Author: paodb

src/test/java/com/flowingcode/vaadin/addons/googlemaps/CustomizedMarkerIconsDemo.java

@@ -36,7 +36,7 @@ protected void createGoogleMapsDemo(String apiKey) {
     GoogleMap gmaps = new GoogleMap(apiKey, null, null);
     gmaps.setMapType(MapType.ROADMAP);
     gmaps.setSizeFull();
-    gmaps.setCenter(new LatLon(-31.635175, -60.698405));
+    gmaps.setCenter(new LatLon(-31.620173186615883, -60.67964404821396));
     gmaps.setZoom(16);
 
     // marker ONLY using an url for the marker's icon image

src/test/java/com/flowingcode/vaadin/addons/googlemaps/GoogleMapsDemo.java

@@ -41,7 +41,7 @@ protected void createGoogleMapsDemo(String apiKey) {
     GoogleMap gmaps = new GoogleMap(apiKey, null, null);
     gmaps.setMapType(MapType.SATELLITE);
     gmaps.setSizeFull();
-    gmaps.setCenter(new LatLon(-31.636036, -60.7055271));
+    gmaps.setCenter(new LatLon(-31.620173186615883, -60.67964404821396));
 
     // add click listener to get latitude and longitude on left click
     gmaps.addClickListener(