Fix Scrollview-Paginator tests that were breaking on IE10

These tests work on IE6-10, FF, Chrome, iOS6 but have not been tested on Android2.3 and 4.x yet.

    Move x should advance 1 page right: failed.
    Timeout: wait() called but resume() never called.

    Move left on X should snap back: failed.
    Timeout: wait() called but resume() never called.

    Disabled scrollviews should not advance page index on flick: failed.
    Timeout: wait() called but resume() never called.

I got around them by passing in callbacks to the `simulateGesture()` method, instead of calling `wait()` and `resume()`. 

These tests have all passed in IE6-10, Chrome, FF, Safari, iOS6.1, but I don't have an Android device so I couldn't test it on 2.3 and 4.x. If you do have one, you can hit [this localtunnel URL](http://44mv.localtunnel.com/yui3/src/scrollview/tests/unit/scrollview-paginator-unit-test.html) and help me test it. Thanks!