Added a check that the call is not using a test api key.

Removed the tests for trial mode service for the scheduled tasks and the process job.
Having the validation in the POST notification and create job endpoint is enough.
Updated the test_service_whitelist test because the order of the array is not gaurenteed.

tests/app/v2/notifications/test_post_letter_notifications.py

@@ -249,3 +249,19 @@ def test_post_letter_notification_doesnt_send_in_trial(client, sample_trial_lett
     assert error_json['status_code'] == 403
     assert error_json['errors'] == [
         {'error': 'BadRequestError', 'message': 'Cannot send letters when service is in trial mode'}]
+
+
+def test_post_letter_notification_calls_update_job_sent_to_dvla_when_service_is_in_trial_mode_but_using_test_key(
+        client, sample_trial_letter_template, mocker):
+    build_dvla_task = mocker.patch('app.celery.tasks.build_dvla_file.apply_async')
+    update_job_task = mocker.patch('app.celery.tasks.update_job_to_sent_to_dvla.apply_async')
+
+    data = {
+        "template_id": sample_trial_letter_template.id,
+        "personalisation": {'address_line_1': 'Foo', 'address_line_2': 'Bar', 'postcode': 'Baz'}
+    }
+    letter_request(client, data=data, service_id=sample_trial_letter_template.service_id,
+                   key_type=KEY_TYPE_TEST)
+    job = Job.query.one()
+    update_job_task.assert_called_once_with([str(job.id)], queue='research-mode-tasks')
+    assert not build_dvla_task.called