Fix gems_directory to point to 2.3.0 instead of 2.3.3
Fix gem_directory's ruby version.
Related to https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1789
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fix gem_directory's ruby version.
Related to https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1789