Update NotificationTechnicalFailureException

- Change the NotificationTechnicalFailureException so that it only inherits from Exception.
- The notify_celery task should create the logging message on failure.
- Fix unit tests
- Remove named parameter when raising exception.

tests/app/celery/test_ftp_update_tasks.py

@@ -173,9 +173,7 @@ def test_update_letter_notifications_to_sent_to_dvla_updates_based_on_notificati
 
 
 def test_update_letter_notifications_to_error_updates_based_on_notification_references(
-    client,
-    sample_letter_template,
-    mocker
+    sample_letter_template
 ):
     first = create_notification(sample_letter_template, reference='first ref')
     second = create_notification(sample_letter_template, reference='second ref')
@@ -184,7 +182,7 @@ def test_update_letter_notifications_to_error_updates_based_on_notification_refe
     with freeze_time(dt):
         with pytest.raises(NotificationTechnicalFailureException) as e:
             update_letter_notifications_to_error([first.reference])
-    assert first.reference in e.value.message
+            assert first.reference in e.value
 
     assert first.status == NOTIFICATION_TECHNICAL_FAILURE
     assert first.sent_by is None

tests/app/celery/test_nightly_tasks.py

@@ -194,7 +194,7 @@ def test_update_status_of_notifications_after_timeout(notify_api, sample_templat
                 seconds=current_app.config.get('SENDING_NOTIFICATIONS_TIMEOUT_PERIOD') + 10))
         with pytest.raises(NotificationTechnicalFailureException) as e:
             timeout_notifications()
-        assert str(not2.id) in e.value.message
+            assert str(not2.id) in e.value
         assert not1.status == 'temporary-failure'
         assert not2.status == 'technical-failure'
         assert not3.status == 'temporary-failure'

tests/app/celery/test_provider_tasks.py

@@ -65,11 +65,11 @@ def test_should_go_into_technical_error_if_exceeds_retries_on_deliver_sms_task(s
 
     with pytest.raises(NotificationTechnicalFailureException) as e:
         deliver_sms(sample_notification.id)
+        assert sample_notification.id in e.value
 
     provider_tasks.deliver_sms.retry.assert_called_with(queue="retry-tasks", countdown=0)
 
     assert sample_notification.status == 'technical-failure'
-    assert str(sample_notification.id) in e.value.message
 
 
 def test_should_go_into_technical_error_if_exceeds_retries_on_deliver_email_task(sample_notification, mocker):
@@ -78,10 +78,10 @@ def test_should_go_into_technical_error_if_exceeds_retries_on_deliver_email_task
 
     with pytest.raises(NotificationTechnicalFailureException) as e:
         deliver_email(sample_notification.id)
+        assert sample_notification.id in e.value
 
     provider_tasks.deliver_email.retry.assert_called_with(queue="retry-tasks")
     assert sample_notification.status == 'technical-failure'
-    assert str(sample_notification.id) in e.value.message
 
 
 def test_should_technical_error_and_not_retry_if_invalid_email(sample_notification, mocker):