Add the "get" and "watch" verbs to the ClusterRole created
for the sample apiserver. Without this, the test complains about
"Failed to watch..." the resources in question.
Strictly speaking the "get" verb doesn't seem to be needed, but
this aligns the e2e test with the example at
staging/src/k8s.io/sample-apiserver/artifacts/example/rbac.yaml
a9f80c70b2