Use proper nampespace qualifiers to address gcc/clang failures
Use proper nampespace qualifiers to address gcc/clang failures

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