fix LoopBrickTest

with introduction of bottombar the visible list of bricks is shorter on
small devices and the drag operation did not work as expected; to get
scrolling, stepCount of solo.drag has to be increased
fix PlaySoundBrickTest

refactor test to pass with new navigation in actionbar
fix LegoNXTTest
fix SwitchToCostumeTest

* refactor test to run with new spinner navigation
* add UiTestUtils method to wait for a fragment
Merge branch 'issue#98_testRefactoring' into issue#98