Show test names as you go

This means we can see what the failing test was, without waiting for the suite
to finish.
Pin gem versions as per styleguide

Pinning gem versions speeds up dependency resolution and also documents intent.

In this case, it has highlighted that we are using a very different
ActiveRecord: 4.0.0. vs 3.2.13 in the Transition app.
Merge pull request #23 from alphagov/pin_gem_versions

Pin gem versions as per styleguide