Fix assign code owners spec
What does this MR do?
Fixes ee_assign_code_owners_spec.rb
There is a new setting checkbox under Settings > General > Merge request approvals called "Require approval from code owners" that needs to be enabled for the purpose of this test.
Closes: gitlab-org/quality/staging#39 (closed)
CE Port: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30743
Conformity
Edited by Sanad Liaquat