CE -> EE port: System notes meta data
Port of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9964 to EE
EE specific: approvals
Same changes as in the CE MR.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Port of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9964 to EE
EE specific: approvals
Same changes as in the CE MR.