add rbac for cockpit-skipper
add rbac for cockpit-skipper

Signed-off-by: tkrop <f7b5f73f0a9e93cbd85d9a629ebe38dffd4a4ae3@zalando.de>

zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws