Add common parent type of OBJECT_VERSION_ID and HIER_OBJECT_ID

Changes made: - in Support IM, identification package, add new type UID_BASED_ID as parent of   OBJECT_VERSION_ID and HIER_OBJECT_ID, with parent = OBJECT_ID - in this class define the functions root, extension and has_extension in such a   way as to return, respectively:     * the part before the first "::" separator, or else the whole string if none     * the part after the first "::" separator, or else an empty string if none     * True if not has_extension.is_empty   These semantics will return the correct result for both subtypes (in the case of   OBJECT_VERSION_ID, they will return the object_id, and for the extention, the   version_tree_id::creating_system_id - in the LOCATABLE class (archetyped package, Common IM) replace uid: HIER_OBJECT_ID   with uid: UID_BASED_ID.