SYSML2 — Property_Mapping should map to ItemUsage and the class name is misleading

Property_Mapping maps properties typed by a Class or Interface. The target element should be ItemUsage instead of Feature.

The name of the mapping class is misleading. It creates the impression that it maps all kinds of properties, but it only covers the cases where a Class or Interface types properties. Rename the mapping class to PropertyTypedByClassInterface_Mapping.

The specialized mapping classes ConstraintParameter_Mapping, Port_Mapping, and Part_Mapping should specialize PropertyCommon_Mapping instead of Property_Mapping.