Update GitLab CI service to work with new GitLab CI

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Modify tests to match new gitlab_ci_service logic

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'gitlab-ci-parallel' into 'master'

Update GitLab CI service to work with new GitLab CI

See merge request !1239