based on #23100
Upgrade zone.js to latest version, currently this PR is just for test, because it depends on my zone.js branch.
in zone.js 0.8.21, there are several feature which break angular test.

1. move async/fakeAsync from angular to zone.js
2. support jasmine.clock() to be auto jump into fakeAsync

beforeEach(() => {
      jasmine.clock().install();
    });

    afterEach(() => {
      jasmine.clock().uninstall();
    });

    it('should get date diff correctly', () => {  // we don't need fakeAsync here.
      // automatically run into fake async zone, because jasmine.clock() is installed.
      const start = Date.now();
      jasmine.clock().tick(100);
      const end = Date.now();
      expect(end - start).toBe(100);
    });

this feature break the test cases in aio. https://github.com/angular/angular/blob/master/aio/src/app/app.component.spec.ts#L1110
which use jasmine.clock() to simulate timer, but still use async/await, so it will be TIMEOUT, in this PR, just remove async/await and use tick.

3. several test cases in angular will be timeout, https://travis-ci.org/angular/angular/jobs/360448001
   the reason is because zone.js AsyncTestZoneSpec add a new feature to be able to wait non resolved promise.then, it seems this feature will have a big impact to current angular test cases, for example, in the following case,
   https://github.com/angular/angular/blob/master/packages/compiler/test/metadata_resolver_spec.ts#L87
   current test case seems have some error, that the promise.then never invoked, but in earlier version of zone.js, this test case will pass, but in zone.js 0.8.21, this will fail. there are several similar cases, so I just disable this feature in fix(fakeAsync): fix #1050, should only reset patched Date.now until fakeAsync exit  zone.js#1051, and I will check all related test cases in angular later.