Add tests for civil-partnership tasklist features
Add tests for civil-partnership tasklist features

The Modelling Services team are testing the tasklist header and sidebar features for a new tasklist `End a civil partnership: step by step`.

Trello card: https://trello.com/c/ahzNdh5h

alphagov/fastly-configure,alphagov/fastly-configure,alphagov/fastly-configure