fix bundle and run test against it

js/tests/unit/.eslintrc.json

@@ -6,7 +6,8 @@
   },
   "globals": {
     "sinon": false,
-    "Util": false
+    "Util": false,
+    "bootstrap": false
   },
   "parserOptions": {
     "ecmaVersion": 5,

js/tests/unit/util.js

@@ -1,6 +1,8 @@
 $(function () {
   'use strict'
 
+  window.Util = typeof bootstrap !== 'undefined' ? bootstrap.Util : Util
+
   QUnit.module('util')
 
   QUnit.test('Util.getSelectorFromElement should return the correct element', function (assert) {