Show departmental acronyms in services list.

Add acronyms for existing services, which were missing them.

No tests since there's no logic, just display - shout if you
think this is wrong.

Pivotal story: https://www.pivotaltracker.com/s/projects/911874/stories/70840458
Merge pull request #484 from alphagov/feature/add-dept-acronyms-to-filtered-service-list

Show departmental acronyms in services list.