Added test case for scaling CoordinateCouplerConstraint. Fixes #1973.
Added test case for scaling CoordinateCouplerConstraint. Fixes #1973.

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