Collada Export Py3 Fixes
Collada Export Py3 Fixes

To allow successful Collada Export for Py3 and Py2, tested import of DAE file with colours from Blender to ensure no regression on the import side. Note: I had to download Pycollada to enable testing in Conda build.
Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master