Update checksum data for overseas-passports
Update checksum data for overseas-passports

We generated regression test artefacts for all countries and ran the
tests after making the changes in this branch. They all passed so we're
confident that our refactoring hasn't changed the behaviour at all.

alphagov/smart-answers,aledelcueto/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers,aledelcueto/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers,alphagov/smart-answers