Fix missing EE-specific service parameters for Jenkins CI
This fixes configuring Jenkins CI.
These lines seem to be omitted in 8.11 altogether with no git history:
When I look at all the commits in the history, I see no sign that these EE parameters disappeared:
https://gitlab.com/gitlab-org/gitlab-ee/commits/master/app/controllers/concerns/service_params.rb
Closes gitlab-com/support-forum#946, #934 (closed)