Include pytest-bdd with frozen tests

This is needed so the pytest_bdd_apply_hook in conftest is valid - BDD
tests are still skipped when frozen for now.

scripts/dev/run_frozen_tests.py

@@ -30,8 +30,9 @@ import pytest_instafail
 import pytest_faulthandler
 import pytest_xvfb
 import pytest_rerunfailures
+import pytest_bdd.plugin
 
 sys.exit(pytest.main(plugins=[pytestqt.plugin, pytest_mock,
                               pytest_catchlog, pytest_instafail,
                               pytest_faulthandler, pytest_xvfb,
-                              pytest_rerunfailures]))
+                              pytest_rerunfailures, pytest_bdd.plugin]))