Bricks clone test

Add sprite clone test; CAT-1063
Add tests for cloning physics bricks; CAT-1084
Fix copy process of "When collision between" - Brick; CAT-1063

Testrun: https://jenkins.catrob.at/view/All-Categories/view/Catroid-multi-job/job/Catroid-Multi-Job-Custom-Branch/2082/
refactored into a new methode "checkFormula(...)"