- document needed packages in hostexec image
- add RunHostCmdOrDie
- kube-proxy e2e: port from ssh to hostexec
  - use preset NodeName to schedule test pods to different nodes
  - parallel launch of pods
  - port from ssh to hostexec
  - add timeout because nc might block on udp
  - delete test container without grace period
- PrivilegedPod e2e: port from ssh to hostexec
- NodePort e2e: port from ssh to hostexec
- cluster/mesos/docker: Enable privileged pods