docs(aio): Upgrade examples to Angular 6 (#23234)

PR Close #23234

aio/content/examples/cli-quickstart/e2e/src/app.e2e-spec.ts

@@ -0,0 +1,14 @@
+'use strict'; // necessary for es6 output in node
+
+import { browser, element, by } from 'protractor';
+
+describe('cli-quickstart App', () => {
+  beforeEach(() => {
+    return browser.get('/');
+  });
+
+  it('should display message saying app works', () => {
+    let pageTitle = element(by.css('app-root h1')).getText();
+    expect(pageTitle).toEqual('Welcome to My First Angular App!!');
+  });
+});