Fix codeowners spec

What does this MR do?

Fixes the e2e test that was broken after changes from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22779 were merged into EE.

What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/quality/nightly/issues/31

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug (it is a test)
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides