remove todo, add gitSHA into version information

[zjj2wry]

I1214 14:57:52.480730   20446 main.go:83] No controller_config_file provided; using empty config.
I1214 14:57:52.481311   20446 main.go:113] tf_operator Version: 0.3.0+git
I1214 14:57:52.481332   20446 main.go:114] Git SHA: ba0bdfb
I1214 14:57:52.481338   20446 main.go:115] Go Version: go1.9.2
I1214 14:57:52.481343   20446 main.go:116] Go OS/Arch: darwin/amd64

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This change is 

[gaocegege]

LGTM

[jlewi]

This Makefile isn't invoked by our CI/CD test infrastructure so the changes wouldn't actually be picked up by the released artifacts.

The current approach is to use Python scripts to invoke the build steps (bazel has been discussed as a possible solution).

This is the Python function that invokes go build in our continuous tests
https://github.com/tensorflow/k8s/blob/master/py/release.py#L138

Our continuous release process is just a cron job that invokes that script
https://github.com/tensorflow/k8s/blob/master/release/releaser.yaml

So I think you just want to update the go command line here
https://github.com/tensorflow/k8s/blob/master/py/release.py#L138

And then the changes would be picked up.

[zjj2wry]

@jlewi thanks you very much, will do it

[jlewi]

@zjj2wry Let me know when this is ready for another look.

[coveralls]

Coverage remained the same at 37.782% when pulling 97fc9bf on zjj2wry:makefile into 60b8f7a on tensorflow:master.

[zjj2wry]

@jlewi sorry for delay, this ready, ptal

[jlewi]

Thanks!