Update to latest docker client

[pweil-]

This would be required for implementation of #6287

In particular this gives access to the SecurityOpt configuration https://github.com/GoogleCloudPlatform/kubernetes/blob/fb633704515e51fdd318adc79e64db56e3b07a98/Godeps/_workspace/src/github.com/fsouza/go-dockerclient/container.go#L419

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[dchen1107]

LGTM. Can you run e2e test before merge?

[pweil-]

Will do. Thanks!

[pweil-]

@dchen1107 - I have a clean gce run of most of the e2e tests. For some reason the MasterCerts spec hangs for me. I can run the same gcloud ls command in another window and see it return with all the files the test should be looking for.

[pweil@localhost kubernetes]$ go run hack/e2e.go -v -test -test_args="-t Docker Containers -t Pods -t PD -t Networking -t Cadvisor -t emptyDir -t Events -t ReplicationController -t Services"

<snip>

Ran 24 of 39 Specs in 548.645 seconds
SUCCESS! -- 24 Passed | 0 Failed | 0 Pending | 15 Skipped I0413 17:38:49.167678   21765 driver.go:114] All tests pass

[dchen1107]

Thanks!