Revert "Merge branch...
Revert "Merge branch '1068-the-gitlab-rails-ce-and-gitlab-rails-ee-jobs-should-use-gitlab_ref_slug-instead-of-gitlab_-c-e-e_version' into 'master'"
This reverts commit ea7b7468, reversing changes made to d2b1af9b.
Reverting !187 (merged)
Slugiffying the version causes issues when we are trying to build tags.
Related to: https://gitlab.com/charts/gitlab/issues/1068