Failing tests for 1.3.6++

On Arch Linux we're currently shipping 1fad482b as none of django-mailman3, hyperkitty, postorius or mailman-web have seen a release in a very long time and their last releases are not compatible with current django versions anymore.

On that commit I have two failing tests:

FAILED ../src/postorius/tests/mailman_api_tests/test_subscriptions.py::TestSubscription::test_change_subscription_from_address_to_primary
FAILED ../src/postorius/tests/mailman_api_tests/test_user.py::MailmanUserTest::test_access_list_options_multiple_subscriptions

Full test log: postorius-1.3.6.r155.g1fad482b-1-x86_64-check.log