update packages

[YujiOshima]

Currently, we get a build error around docker package when we use vendored package.

go build github.com/kubeflow/hp-tuning/manager
# github.com/kubeflow/hp-tuning/vendor/github.com/docker/docker/client
vendor/github.com/docker/docker/client/container_commit.go:17:15: undefined: reference.ParseNormalizedNamed
vendor/github.com/docker/docker/client/container_commit.go:25:9: undefined: reference.TagNameOnly
vendor/github.com/docker/docker/client/container_commit.go:30:16: undefined: reference.FamiliarName
vendor/github.com/docker/docker/client/image_create.go:17:14: undefined: reference.ParseNormalizedNamed
vendor/github.com/docker/docker/client/image_create.go:23:25: undefined: reference.FamiliarName
vendor/github.com/docker/docker/client/image_import.go:19:16: undefined: reference.ParseNormalizedNamed
vendor/github.com/docker/docker/client/image_pull.go:24:14: undefined: reference.ParseNormalizedNamed
vendor/github.com/docker/docker/client/image_pull.go:30:25: undefined: reference.FamiliarName
vendor/github.com/docker/docker/client/image_pull.go:60:8: undefined: reference.TagNameOnly
vendor/github.com/docker/docker/client/image_push.go:20:14: undefined: reference.ParseNormalizedNamed
vendor/github.com/docker/docker/client/image_push.go:20:14: too many errors

Trying to use the latest docker(moby), go dep cannnot resolve dependency error.
For now, we should use docker 1.3.1.
Kubernetes looks using docker 1.2.0 ( https://github.com/kubernetes/kubernetes/blob/master/Godeps/Godeps.json#L1046 ).

/assign @gaocegege

Signed-off-by: YujiOshima [email protected]

[gaocegege]

/lgtm Sorry for the mistake.

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