OARIS2 — subsystem_id removed from v2.0

The parameter subsystem_id has been removed from sensor_track_type. The parameter subsystem_id was added in OARIS 1.1 and provided a few benefits to include ensuring samples being unique since it was used in key. Please can we have it back.

The same issue can be found in sensor_plot_type, perform_cued_search_type and report_cued_search_result_type. Not all interfaces have been checked, but assume the same issue exists elsewhere.

It is assumed that removing subsystem_id is not intentional and in error, since it is documented in the DDS PSM at section 8.2, but does not appear in the PIM in the earlier sections.

Suggest also that subsystem_id_type is changed from unsigned short to unsigned long. This aligns with other UK information models.

Reinstate subsystem_id to PSMs

subsystem_id was omitted from the DDS/IDL PSM mapping in error in the v2.0 proposal (change to PSM generation approach).
This attribute should be added back in to the DDS/IDL PSM files. One keyed attribute per topic type.
Note that the subsystem_id attribute continued to be described as being a key in topic structs in section 8.2.