CLC-3410 Eleventh batch of reorg: miscellaneous

https://jira.ets.berkeley.edu/jira/browse/CLC-3410

Rearranged: Oec, Berkeley, Rosters, Financials, UpNext, Regblocks, and models that were hanging out in the root of app/models. 

There's one model left to move, UserApi, which I'll do after Mike's UserApi refactoring lands.