REFACTOR: Import QUnit and related helpers rather than globals

We used many global functions to handle tests when they should be
imported like other libraries in our application. This also gets us
closer to the way Ember CLI prefers our tests to be laid out.

app/assets/javascripts/wizard/test/acceptance/wizard-test.js

@@ -1,8 +1,9 @@
+import { test, module } from "qunit";
 import { run } from "@ember/runloop";
 import startApp from "wizard/test/helpers/start-app";
 
 var wizard;
-QUnit.module("Acceptance: wizard", {
+module("Acceptance: wizard", {
   beforeEach() {
     wizard = startApp();
   },

app/assets/javascripts/wizard/test/components/invite-list-test.js

@@ -1,3 +1,4 @@
+import { moduleForComponent } from "ember-qunit";
 import { componentTest } from "wizard/test/helpers/component-test";
 moduleForComponent("invite-list", { integration: true });
 

app/assets/javascripts/wizard/test/helpers/component-test.js

@@ -1,4 +1,5 @@
 import initializer from "wizard/initializers/load-helpers";
+import { test } from "qunit";
 
 export function componentTest(name, opts) {
   opts = opts || {};

app/assets/javascripts/wizard/test/models/wizard-field-test.js

@@ -1,3 +1,5 @@
+import { moduleFor } from "ember-qunit";
+import { test } from "qunit";
 import WizardField from "wizard/models/wizard-field";
 
 moduleFor("model:wizard-field");

app/assets/javascripts/wizard/test/test_helper.js

@@ -9,12 +9,12 @@
 //= require route-recognizer/dist/route-recognizer
 //= require fake_xml_http_request
 //= require pretender/pretender
+//= require qunit/qunit/qunit
+//= require ember-qunit
 //= require discourse-loader
 //= require jquery.debug
 //= require handlebars
 //= require ember-template-compiler
-//= require qunit/qunit/qunit
-//= require ember-qunit
 //= require wizard-application
 //= require wizard-vendor
 //= require helpers/assertions