Switch e2e/scenarios.js to use index-async.html

Author: chrismilleruk

test/e2e/scenarios.js

@@ -5,7 +5,7 @@
 describe('my app', function() {
 
   beforeEach(function() {
-    browser().navigateTo('../../app/index.html');
+    browser().navigateTo('../../app/index-async.html');
   });