Fix a panic on a kms encryption failure Resolves #452
Fix a panic on a kms encryption failure
Resolves #452

HotelsDotCom/kube-aws,danielfm/kube-aws,everpeace/kube-aws,kubernetes-incubator/kube-aws,danielfm/kube-aws,kubernetes-incubator/kube-aws,iflix-letsplay/kube-aws,everpeace/kube-aws,HotelsDotCom/kube-aws,c-knowles/kube-aws,mumoshu/kube-aws,camilb/kube-aws,iflix-letsplay/kube-aws,camilb/kube-aws,c-knowles/kube-aws,mumoshu/kube-aws