re-add qunit bootstrap conditional

assets/javascripts/wizard/tests/bootstrap.js.es6

@@ -1,6 +1,7 @@
 // discourse-skip-module
 /*global document, Logster */
 
+if (window.location.pathname.indexOf("/w/") > -1 && Ember.testing) {
   document.addEventListener("DOMContentLoaded", function () {
     document.body.insertAdjacentHTML(
       "afterbegin",
@@ -22,3 +23,4 @@ if (window.Logster) {
   } else {
     window.Logster = { enabled: false };
   }
+}