Added test cases for Markers and PathActuators attached to a Body indirectly via PhysicalOffsetFrames.
Added test cases for Markers and PathActuators attached to a Body indirectly via PhysicalOffsetFrames.

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core