Fix pod deletion to be compatible with Kubernetes 1.9
Fix pod deletion to be compatible with Kubernetes 1.9

* Check each pod's OwnerReferences to determine whether it is
owned by an existing Daemonset. If so, exclude it from deletion
as the pod would just be recreated by the Daemonset controller
* Drop usage of CreatedByAnnotation to deserialize the owner
object of a pod when listing pods to delete during agent drains

sdemos/container-linux-update-operator,sdemos/container-linux-update-operator