fix: pass pytest openedx RegistrationViewTestV2

[Carlos-Muniz]

As part of #36, several tests have been discovered that are not passing in tutor, but passing in devstack. The following tests may not be run by tutor, or may be failing in tutor.

openedx/core/djangoapps/user_authn/views/tests/test_register.py::RegistrationViewTestV2::

• test_field_order_invalid_override
• test_register_form_year_of_birth

For more information about the tests that passed, failed, skipped, or never ran, see the spreadsheet with all the tests.

[Carlos-Muniz]

This test(s) does pass in tutor. See #155 for more details.