Fix Wizard unit tests

app/assets/javascripts/wizard/initializers/load-helpers.js.es6

@@ -3,12 +3,12 @@ import { registerHelpers } from 'discourse-common/lib/helpers';
 export default {
   name: 'load-helpers',
 
-  initialize(container, registry) {
+  initialize(application) {
     Object.keys(requirejs.entries).forEach(entry => {
       if ((/\/helpers\//).test(entry)) {
         require(entry, null, null, true);
       }
     });
-    registerHelpers(registry);
+    registerHelpers(application);
   }
 };