CATROID-1469 Test: testCloneValues failing

[Rawbat]

Fixed by mocking the problematic method "setFixedRotation" in the physics object.
This required it to make the method public.

https://jira.catrob.at/browse/CATROID-1469

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[UlrichLa]

Looks good to me.

[mseiser]

thank you! 👍