re-add qunit bootstrap conditional

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

@@ -1,7 +1,8 @@
 // discourse-skip-module
 /*global document, Logster */
 
-document.addEventListener("DOMContentLoaded", function () {
+if (window.location.pathname.indexOf("/w/") > -1 && Ember.testing) {
+  document.addEventListener("DOMContentLoaded", function () {
     document.body.insertAdjacentHTML(
       "afterbegin",
       `
@@ -9,16 +10,17 @@ document.addEventListener("DOMContentLoaded", function () {
         <style>#ember-testing-container { position: absolute; background: white; bottom: 0; right: 0; width: 640px; height: 384px; overflow: auto; z-index: 9999; border: 1px solid #ccc; } #ember-testing { zoom: 50%; }</style>
       `
     );
-});
+  });
 
-Object.keys(requirejs.entries).forEach(function (entry) {
+  Object.keys(requirejs.entries).forEach(function (entry) {
     if (/\-test/.test(entry)) {
       requirejs(entry);
     }
-});
+  });
 
-if (window.Logster) {
+  if (window.Logster) {
     Logster.enabled = false;
-} else {
+  } else {
     window.Logster = { enabled: false };
+  }
 }