message: fix notification service tests
diff: @@ -81,7 +81,7 @@ describe('Service: Notification service', () => {
  tick(1000); // wait for subscribe
  }));
  - it('warning disappears immediately after action', async(() => {
  + it('warning disappears immediately after action', fakeAsync(() => {
  const fixture = TestBed.createComponent(MdlTestViewComponent);
  fixture.detectChanges();
  @@ -95,8 +95,11 @@ describe('Service: Notification service', () => {
  // snackbar appeared, proceed
  expect(mdlSnackbarComponent.isActive()).toBe(true);
  fixture.nativeElement.querySelectorAll('button')[0].click();
  + tick(3500);
  + fixture.detectChanges();
  expect(mdlSnackbarComponent.isActive()).toBe(false);
  });
  + tick(1000);
  }));
  it('warning action handler is called on action button click', fakeAsync(() => {
  