* CLDC-2863: rename maintenance_mode_enabled? to service_unavailable?
* CLDC-2863: update 'maintenance' to 'service unavailable' in tests
* CLDC-2863: rename check_maintenance to check_maintenance_status
* CLDC-2863: implement service_moved functionality
* CLDC-2863: add tests for service_moved functionality
* CLDC-2863: add tests for when both feature toggles are on
* CLDC-2863: remove full stop from service moved page title
* CLDC-2863: turn on service moved feature
* CLDC-2863: turn off service moved feature