Bug 967216 - Intermittent calendar/test/unit/app_test.js | app global events moztimechange | expected 2 to equal 1

Looks like this `setTimeout` have a race condition with the other `setTimeout`[1]. So the intermittent failures are happened.
[1] https://github.com/mozilla-b2g/gaia/blob/master/apps/calendar/js/app.js#L544-L546