Test FadeInOut animator

This is the first test for FadeInOut animator, for simplicity I basically cloned testAddAnnotationsSimple.
Since the alpha animation itself can not be tested I just check the ending alpha value. Just a note: after adding and testing the annotation alpha I keep a reference to the UIView so I can remove the annotation and still test the alpha value. Once the annotation is added again I still check the very same UIView .. now this could be wrong, because I don't think its guaranteed anywhere in MapView that it would reuse it. Anyway thi is a first step :)