update godeps

Signed-off-by: Simon Leung <leungs@us.ibm.com>
optimize integration suite: only build assets on node 1
bump deps
Implementation of Docker tailor w/ metadata fetch

WIP: Will need to rebase on new StagingMetadata work

[#75217010]
Change args for integration

Expect docker:// URIs and docker 1.2.0 commands without /bin/sh -c prefix
Remove unused func
Handle crashes due to blank reg, nil auth config, nil req factory
Serialize ExecutionMetadata with cmd and entrypoint
Use StagingDockerResult struct as envelope for tailor's metadata
Bump godeps for DockerStagingResult

[#75217010]