* [python] Add task decorator for python function
* Add decorator `@task`
* Add a tutorial about it
* Change tutorial doc and combine into traditional docs
* Add sphinx-inline-tab for better view
* revert not need change
* Correct python function indent
* Correct integration test
Currently the size of our distribute package is up to
800MB, this patch is migrate python gateway server into
api server
The distribute package size before and after this patch is:
```sh
# before
796M apache-dolphinscheduler-2.0.4-SNAPSHOT-bin.tar.gz
# after
647M apache-dolphinscheduler-2.0.4-SNAPSHOT-bin.tar.gz
```
* [python] Fix change exists pd attribute user error
* Remove attribute from class ProcessDefinition, cause it should to
object User instead of object ProcessDefinition.
* Grant project to user if attribute user change for exists ProcessDefinition
close: #8751
* Add py.test conftest.py for package integration
* [python] Add integrated test to python gateway server
* Build java code and create standalone server image in GA
* Add component start docker in python
* Run example to make sure it work to it
close: #8035
* Fix build docker image working directory
* Fix working directory
Jiajie Zhong