Updating calculate-state-pension smartanswer

Calculate State Pension has been through a robust factcheck. This PR turns the v2 version into a v1 ready to be deployed.
Adding missing data files and updating state_pension_amount_calculator

The 'publish' rake task doesn't know about these additional data files so this adds them. Updaing the calculator file to point to v1 files.
Merge pull request #1274 from alphagov/publish_state_pension_calculator

Publish state pension calculator smart-answer