Add first test for drf adapter.

I played around with trying to get the tests working but I couldn't figure it out.  I'll add some comments inline.
I think is better to remove the migration files for tests. I mean, if we add a new test that relies on a different schema it will probably break other tests so a new model should be created specifically for that test. When you run migrate django will create the initial one, so it is safe to remove the initial one as well.