Add `block_auto_created_users` to LDAP configuration.
When gitlab-org/gitlab-ce!522 is merged, block_auto_created_users needs to be added to the LDAP configuration.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
When gitlab-org/gitlab-ce!522 is merged, block_auto_created_users needs to be added to the LDAP configuration.