*: Add copyright owner in go files

[gaocegege]

Close #266

Signed-off-by: Ce Gao [email protected]

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This change is 

[k8s-ci-robot]

Hi @gaocegege. Thanks for your PR.

I'm waiting for a kubernetes or tensorflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[coveralls]

Coverage remained the same at 31.746% when pulling 9e8825c on gaocegege:copyright into 330eb92 on tensorflow:master.

[ewilderj]

Please revise to Copyright The Kubeflow Authors, vs Google.

[jlewi]

I apologize for giving incorrect and misleading information about the author.

[gaocegege]

@ewilderj I filed the PR before I saw the comment 😄 And it could be frozen until we have a conclusion about the copyright owner.

@jlewi Never mind 😃

[ewilderj]

@gaocegege thanks for your work on this!

[gaocegege]

I have updated the owner to The Kubeflow Authors, PTAL

[ScorpioCPH]

Thanks for this work!
For Copyright comments, I prefer to /* */ style rather than //.

[gaocegege]

This is generated by google's tool: https://opensource.google.com/docs/releasing/preparing/#include-license-file-and-source-code-headers