More Python client weirdness
More Python client weirdness

There’s some weird interaction between the message attribute of the
exception and mocking.

Luckily there is an internal attribute – `_message` which doesn’t go
through all the magic.

alphagov/notifications-admin,gov-cjwaszczuk/notifications-admin,gov-cjwaszczuk/notifications-admin,alphagov/notifications-admin,gov-cjwaszczuk/notifications-admin,gov-cjwaszczuk/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin