We're changing view driving record to view driving licence

We will redirect the old page after this gets merged. After conversations with alexm and jabley we've decided to leave the data group as is for now. We have data group inconsistencies elsewhere and changing this will introduce alot of complexity into this.
Better link text and title.

This responds to Henry's pull request comment that the link text and
title should be in keeping with the general style of links to services and the.
Merge pull request #789 from alphagov/view-driving-record-to-licence

We're changing view driving record to view driving licence