* ScaleIO persistent volumes now support referencing a secret in a namespace other than the bound persistent volume claim's namespace; this is controlled during provisioning with the `secretNamespace` storage class parameter; StoragePool and ProtectionDomain attributes no longer defaults to the value `default` ([#54013](https://github.com/kubernetes/kubernetes/pull/54013), [@vladimirvivien](https://github.com/vladimirvivien))