Format obj and dae output predictably based on rfc notation of GlobalId. As discussed in https://sourceforge.net/p/ifcopenshell/discussion/1782717/thread/cbb0c8ca/

src/ifcwrap/IfcGeomWrapper.i

@@ -146,6 +146,7 @@
 			type = property(type)
 			guid = property(guid)
 			context = property(context)
+			unique_id = property(unique_id)
 			transformation = property(transformation)
     %}
 };