Currently, our core and side module dependent on each others. and will cause
cycle import in our codebase, especially in issue #10905, we try to refactor
to solve this problem.
This patch do the following change:
* Rename module `side` to `models`
* Move `core/base` and `core/sidebase` to dir `modules`
* Move `configuration` and `default_config.yaml` to the root of pydolphinscheduler
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
Jiajie Zhong