Combine related tests into one
Combine related tests into one

These tests were both requesting the same page with the same input,
saves a lot of boilerplate if they’re not separated.

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