Automatic merge from submit-queue
kubelet/kubenet: split hostport handling into separate module
This pulls the hostport functionality of kubenet out into a separate module so that it can be more easily tested and potentially used from other code (maybe CNI, maybe downstream consumers like OpenShift, etc). Couldn't find a mock iptables so I wrote one, but I didn't look very hard.
@freehan @thockin @bprashanth
d80b60ef7c