fix: 🐛 default to light theme for acceptance tests (#2587)

* fix: 🐛 default to light theme for acceptance tests

* refactor: 💡 add async/await to authenticateSession

ui/admin/tests/acceptance/workers/create-test.js

@@ -5,7 +5,7 @@
 
 import { module, test } from 'qunit';
 import { visit, fillIn, click, findAll, currentURL } from '@ember/test-helpers';
-import { setupApplicationTest } from 'ember-qunit';
+import { setupApplicationTest } from 'admin/tests/helpers';
 import setupMirage from 'ember-cli-mirage/test-support/setup-mirage';
 import { Response } from 'miragejs';
 import { authenticateSession } from 'ember-simple-auth/test-support';