making fedmenu on taskotron landing page configurable

roles/taskotron/taskotron-frontend/templates/landingpage.html.j2

@@ -140,13 +140,15 @@
 
 </div> <!-- end of main row -->
 
-<script src="http://threebean.org/fedmenu/js/fedmenu.js"></script>
+{% if fedmenu_url is defined and fedmemu_data_url is defined %}
+<script src="{{ fedmenu_url }}"></script>
 <script>
   fedmenu({
-    'url': 'http://threebean.org/fedmenu/dev-data.js'
+    'url': '{{ fedmenu_data_url }}'
     'mimeType': 'application/javascript',
     'position': 'bottom-right',
-});
+  });
 </script>
+{% endif %}
 </body>
 </html>