chore(saucelabs): MdButton tests time out

Closes angular#4248

Author: marclaval

modules/angular2_material/test/button_spec.ts

@@ -54,7 +54,7 @@ export function main() {
 
  async.done();
  });
- }));
+ }), 1000);
 
  it('should disable the button', inject([AsyncTestCompleter], (async) => {
  builder.createAsync(TestApp).then(rootTestComponent => {
@@ -78,7 +78,7 @@ export function main() {
  expect(testAppComponent.clickCount).toBe(0);
  async.done();
  });
- }));
+ }), 1000);
  });
 
  describe('a[md-button]', () => {
@@ -113,7 +113,7 @@ export function main() {
  // No clear way to test this; see https://github.com/angular/angular/issues/3782
  async.done();
  }));
- }));
+ }), 1000);
  });
  });
 }