"resourceVersion" and "selfLink" are members of "metadata" rather than
the list. This change reorganize the struct to provide consistency with
other places.

Before this change:
    "kind": "List",
    "metadata": {},
    "resourceVersion": "",
    "selfLink": ""
After this change:
    "kind": "List",
    "metadata": {
        "resourceVersion": "",
        "selfLink": ""
    }

Reference:
https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/types.go#L57