rails 4.2 update for ActiveJob framework
assets gem group is no more in rails 4.2
WIP - 55 specs fail on Rails 4 / rspec 3 now
had to use explicity model.friendly.find to use friendly_ids finders in v5 - plus other spec fixes
skipped some no-longer-needed tests, made link to courts_path in admin courts index explicitly direct as the courts controller is not used anymore
Merge pull request #234 from ministryofjustice/rails4-upgrade

Rails4 upgrade