assessment.sql changes - NULLs to values where needed: CHECK COMMENTS BEFORE MERGING!

I'm not sure why the outcomes add and delete modules changed. I think it must be something Todd just pushed up. Just want to make you aware of this before merging. This, hopefully, final database change included:
- duplicate unit entries eliminated
- NULLs changed to 0 in flags
- some NULLs changed to values for testing; most prominently, all Deactivated ts and user populated where active_flag = 0
- created_user changed to 21 where 0 (so it wasn't pointing to a non-existent user)
- some flags changed to 0 where all were = 1 (so we had some differences for testing)