* Reformat sdk only using the new yapf config.
* Reformat docstrings using docformatter.
* update golden files to resolve diff caused by whitespaces
* fix some tests
* format .py files under sdk/python/tests using yapf
* additional docformatter
* fix some tests
* Feature: sidecar for ContainerOp
* replace f-string with string format for compatibility with py3.5
* ContainerOp now can be updated with any k8s V1Container attributes as well as sidecars with Sidecar class. ContainerOp accepts PipelineParam in any valid k8 properties.
* WIP: fix conflicts and bugs with recent master. TODO: more complex template with pipeline params
* fix proxy args
* Fixed to work with latest master head
* Added container_kwargs to ContainerOp to pass in k8s container kwargs
* Fix comment bug, updated with example in ContainerOp docstring
* fix copyright year
* expose match_serialized_pipelineparam as public for compiler to process serialized pipeline params
* fixed pydoc example and removed unnecessary ContainerOp.container.parent
* Fix conflicts in compiler tests
Chen Sun