1. Better duplicate filtering when getting subteam members
2. Add fail error conditions for things that can break us (such as new users whilst the script is running)
3. Better watchlist sync
4. Deal with failing insert when generating a group ID (it does occasionally happen)
5. Fix group UUIDs
6. Fix broken group insert queries
Change-Id: I9e1257ac5efeae95b3907d227842beb615a7b646