Fix bug in TruthCubeRenderTest, where size of the truth cube are re-scaled to meter (m) to be viewed correctly.
Fix bug in TruthCubeRenderTest, where size of the truth cube
are re-scaled to meter (m) to be viewed correctly.

simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim