OARIS2 — Rationalise DDS/IDL inheritance mapping

The mapping of specialisations duplicates the location of common attributes from the generalisation class into each option of the union. This is inconvenient for the software design of applications using the types.

Use a rationalised DDS/IDL inheritance mapping.

Update the mapping of generalization / specialization inheritance so that attributes of the generalization class are encapsulated into a base class, which then appears as an attributes of each specialization rather than each of the generalization attributes individually.
Also the generated enumeration values are missing the name of the generalization class in their IDL documentation comment.

The impacted IDL files are attached as per the proposed update.