Deduplicate code between CoreSWHID, QualifiedSWHID, and ExtendedSWHID
by making them all derive from an abstract class.
Depends on !260 (closed).
Migrated from D5120 (view on Phabricator)
by making them all derive from an abstract class.
Depends on !260 (closed).
Migrated from D5120 (view on Phabricator)