App should fail on start if ORI setup is incomplete

[wetchler]

Tried creating an instance, but I forgot to do steps 3 and 4 of installation:

3.
cp data/ori.csv.example data/ori.csv
4.
docker-compose build data
docker-compose run data

When I built the instance and ran it, the app splash page (for example) loaded fine. When I went to the dashboard, I got an "Ooops" page. The app's logs showed:

NameError (uninitialized constant Constants::CONTRACTING_ORIS):
  app/models/user.rb:77:in `contracting_oris'
  app/models/user.rb:81:in `allowed_oris'
  app/queries/get_all_incidents_query.rb:10:in `perform_query'
  app/queries/query.rb:6:in `run'
  app/queries/dashboard_incidents_query.rb:8:in `perform_query'
  app/queries/query.rb:6:in `run'
  app/controllers/incidents_controller.rb:155:in `set_incidents'

It took me some head scratching to figure this out. Instead, there should be an initializer function that throws a fit when the app boots, with an informative message, and the app should never start.