upgrade skipper to v0.11.97
upgrade skipper to v0.11.97

Signed-off-by: Arpad Ryszka <f3cdbc10ca70da0bcb31d1298ee9bf3e6b43651c@gmail.com>

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