I think this should be in validator/constants.py and I'd suggest this implementation instead so that when everything is supported `APPLICATIONS == APPROVED_IDS`. This will also mean that `APPROVED_APPLICATIONS` has the be a subset of `APPLICATIONS` which I think is what we want.

```python
APPROVED_IDS = dict((app['guid'], APPLICATIONS[app['guid']]) for app in APPROVED_APPLICATIONS.values())
```