Fix missing EE-specific service parameters for Jenkins CI

Merged Stan Hu requested to merge fix-missing-ee-options into master

This fixes configuring Jenkins CI.

These lines seem to be omitted in 8.11 altogether with no git history:

https://gitlab.com/gitlab-org/gitlab-ee/blob/v8.10.7-ee/app/controllers/concerns/service_params.rb#L17-19

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)