[DO NOT MERGE] track down flaky travis

Travis periodically flakes out on me in hack/test-cmd.sh on the cancel-build step with a message like:
```F1210 16:03:37.203456    5052 helpers.go:21] No such pod: data of kind 'PodList', obj of type 'Pod'```

I'm trying to track it down, so I'll need something to kick travis several times.