Fix assertions when we catch an error in the tests

Code that is within a `with Python.raises(...)` context manager but
comes after the line that raises the exception doesn't get evaluated.
We had some assertions that we never being tested because of this, so
this ensures that they will always get run and fixes them where
necessary.

tests/app/delivery/test_send_to_providers.py

@@ -139,7 +139,7 @@ def test_should_not_send_email_message_when_service_is_inactive_notifcation_is_i
 
     with pytest.raises(NotificationTechnicalFailureException) as e:
         send_to_providers.send_email_to_provider(sample_notification)
-        assert sample_notification.id in e.value
+    assert str(sample_notification.id) in str(e.value)
     send_mock.assert_not_called()
     assert Notification.query.get(sample_notification.id).status == 'technical-failure'
 
@@ -152,7 +152,7 @@ def test_should_not_send_sms_message_when_service_is_inactive_notifcation_is_in_
 
     with pytest.raises(NotificationTechnicalFailureException) as e:
         send_to_providers.send_sms_to_provider(sample_notification)
-        assert sample_notification.id in e.value
+    assert str(sample_notification.id) in str(e.value)
     send_mock.assert_not_called()
     assert Notification.query.get(sample_notification.id).status == 'technical-failure'