* Now pipeline function takes direct default values rather than dsp.PipelineParam. It simplifies the sample code a lot.
* Remove extraneous parenthesis.
* Follow up CR comments.
* Change Dockerfile (not done).
* Fix dockerfile.
* Fix Dockerfile again.
* Remove unneeded installation of packages in Dockerfile.
* Add support for nvidia gpu limit
* Expose resource limits, requests and nodeSelector to ContainerOp
* Fix test data
* Add explicit set_gpu_limit function
* Fix logical bug