Migrate Repository#local_branches from gitlab-ee.
REF: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/249
This will help us to avoid posible merge conflicts when merging gitlab-ce to gitlab-ee
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
REF: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/249
This will help us to avoid posible merge conflicts when merging gitlab-ce to gitlab-ee