Add second test condition where nested model is an actual Model (not a Device).
Add second test condition where nested model is an actual Model (not a Device).

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