Project: mesos
Issue MESOS-3965: Ensure resources in `QuotaInfo` protobuf do not contain `role`
{{QuotaInfo}} protobuf currently stores per-role quotas, including {{Resource}} objects. These resources are neither statically nor dynamically reserved, hence they may not contain {{role}} field. We should ensure this field is unset, as well as update validation routine for {{QuotaInfo}}
Story points: 3