fix: Wait for the app to settle after login and logout.

Author: niranjan94

tests/helpers/custom-helpers.js

@@ -1,4 +1,4 @@
-import { click, fillIn, currentURL, visit } from '@ember/test-helpers';
+import { click, fillIn, currentURL, visit, settled } from '@ember/test-helpers';
 import { currentSession } from 'ember-simple-auth/test-support';
 
 export async function login(assert, email = null, password = null, gotoLoginPage = true) {
@@ -9,10 +9,12 @@ export async function login(assert, email = null, password = null, gotoLoginPage
   await fillIn('input[name=email]', email !== null ? email : '[email protected]');
   await fillIn('input[name=password]', password !== null ? password : 'test-fe-user');
   await click('button[type=submit]');
+  await settled();
 }
 
 export async function logout(assert) {
   await visit('/logout');
+  await settled();
   assert.equal(currentURL(), '/');
   assert.ok(currentSession().session.isAuthenticated !== true);
 }