Django app setting that allows calling model directly rather than flask request

[PeterDSteinberg]

Goal: Make a mocked system test harness so that webapp-public can prepare arguments and jsons as though it is going to submit them to the flask / celery system of deploy but instead calls Python function.

This will allow Django CI tests to do more of the actual functionality of the models without mocking responses of flask. In the past that mocking has resulted in under-testing the interactions of various repositories.