This patch fix the error release state not work when it set to
offline and submit it to Java gateway, it error because we do
not pass the attribute to Java gateway function
`createOrUpdateProcessDefinition`
close: #9779
Add a new method to get config from environment variables
and for now, we have three ways to get config and the
priority is `env-var > custom-config-file > built-in-config-file`.
Environment config setting does not work in CLI, because it will
confuse users when they get config value is `var-env` but value
in the configuration file is `var-in-file`, they may not find
the way how to change it
* Add documentation
* Add it to UPDATING.md
close: #8344
* Change `yaml_parser.py` method `to_string` to magic method
`__str__` make it more pythonic.
* Add some tests to magic method `__str__` and `__repr__`
* [python] refactor yaml file parser
* Change yaml parser package to ruamel.yaml
* Refactor configuration.py module
* And file.py to write file locally
* Add more tests on it
close: #8593
* Fix UT error
* Remove pypyaml from tests
* Fix file error when param create is False
* Fix error logic
* And tests to avoid regression
Jiajie Zhong
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