PDME12 — PDM RTF Issue - The Identifiable interface should raise InvalidProperties

Summary: Identifiable interfaces should be able to raise InvalidProperties exceptions.

The PdmFoundation operations Identifiable::change_id and IdentificationContext::generate_id both take a property_set parameter but, unlike other operations that use PropertySets, they are not defined to raise the InvalidProperties exception.

This is a minor issue. In the interim, implementations can raise the ValidationError exception if the property_set is invalid.

resolved in 1.2 RTF