Both Jenkins services are broken when upgrading to 8.4

The migration https://gitlab.com/gitlab-org/gitlab-ce/blob/master/db/migrate/20160119111158_add_services_category.rb set the category in the database. Specific services were set to ci while all others were set to common. As a result, JenkinsDeprecatedService and JenkinsService in EE were set to common and CI status no longer worked for these users.

We need a new migration to update these services. It should be in a patch release.