Fixed UUID/ Variable UUID

If we see this kind of UUID does it mean it will never change. Visit Diagnoses uuid=159947AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA Concept Dosing Unit uuid=162384AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

No UUID should ever change. And that includes these ones.

The reason these look like they do is because the CIEL dictionary was (is?) managed in a system from an older version of OpenMRS before we introduced UUIDs. So when we export/update from that system, we generate these strange-looking values, rather than randomly generating new UUIDs.