Gitlab 8.0 integrates Gitlab CI inside Gitlab. One crucial change for this plugin is that the URL setting has been removed so we can no longer configure the Gitlab CI service to point to Jenkins.
I believe we need a separate Jenkins integration service for Gitlab now. See documentation at https://gitlab.com/gitlab-org/gitlab-ce/tree/master/doc/integration. A starting point could be the previous version of the Gitlab CI service (from tag 7.14.3): https://gitlab.com/gitlab-org/gitlab-ce/blob/d321305c00f934db9becac1aa9726c3e9b400df5/app/models/project_services/gitlab_ci_service.rb
See also https://gitlab.com/gitlab-org/gitlab-ce/blob/master/app/models/project_services/ci_service.rb
Gitlab 8.0 integrates Gitlab CI inside Gitlab. One crucial change for this plugin is that the URL setting has been removed so we can no longer configure the Gitlab CI service to point to Jenkins.
I believe we need a separate Jenkins integration service for Gitlab now. See documentation at https://gitlab.com/gitlab-org/gitlab-ce/tree/master/doc/integration. A starting point could be the previous version of the Gitlab CI service (from tag 7.14.3): https://gitlab.com/gitlab-org/gitlab-ce/blob/d321305c00f934db9becac1aa9726c3e9b400df5/app/models/project_services/gitlab_ci_service.rb
See also https://gitlab.com/gitlab-org/gitlab-ce/blob/master/app/models/project_services/ci_service.rb