update aws agent
update aws agent

this commit was missing in PR https://github.com/zalando-incubator/kubernetes-on-aws/pull/2259

Signed-off-by: Hanno Hecker <898dba66b7f38fdb797b262b137097fc973d6485@zalando.de>

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