chore(tests): fix spec/ng2/timeout_spec test (#5067)

Author: cnishina

spec/ng2/async_spec.js

@@ -73,7 +73,7 @@ describe('async angular2 application', () => {
           7000);
       await timeout.$('.cancel').click();
 
-      const text = timeout.$('.val').getText();
+      const text = await timeout.$('.val').getText();
       await browser.driver.sleep(3000);
       expect(await timeout.$('.val').getText()).toEqual(text);
     });

spec/ng2/timeout_spec.js

@@ -1,10 +1,10 @@
-describe('async angular2 application timeout', function() {
-  var URL = '/ng2/#/async';
+describe('async angular2 application timeout', () => {
+  const URL = '/ng2/#/async';
 
-  it('should timeout if intervals are used in the NgZone', function() {
-    browser.get(URL);
-    var timeout = $('#periodicIncrement');
-    timeout.$('.action').click();
-    timeout.$('.cancel').click();
+  it('should timeout if intervals are used in the NgZone', async () => {
+    await browser.get(URL);
+    const timeout = $('#periodicIncrement');
+    await timeout.$('.action').click();
+    await timeout.$('.cancel').click();
   });
 });