Fix pb_model and project tests
- boxui/users/tests/test_models was missing a delete operation that was previously commented by mistake at 59e264c1
- Fix pb_model/fields.py so that it works on Django 2.2 BinaryFields in Django 2.2 are backed by a memoryview() instead of bytes()
- Use original models.py code in pb_model
It works if you always put
pb_2_dj_fields = '__all__'
in related models Not putting that value destroys the tests (because they rely onpb_2_dj_fields
being[]
by default)