Co-authored-by: N李长福 <changfu.li@dmall.com>

* fix DS introduction in the README.md

* review README.md

* Update README.md

add some content
Co-authored-by: Ndailidong <dailidong66@gmail.com>

* chore: Refactor code to fix code smell in service module

* chore: Add licence header to new files

* chore: Fix comment from code review

* chore[service]: Reduce the number of custom runtime exception to one

Co-authored-by: Nzt-1997 <“18841012545@163.com”>

[Improvement][Alert]Alert problem repair and optimization

[Improvement][ui] Front-end interface optimization

[Improvement-4573][UI] Adds prompt message to DAG page button

[fixbug-4570][ui] When deleting a workflow connection, all connections disappear

When the alert is executed, if the alarm group is not bound to the alert plug-in, the alert status is updated to fail.

When deleting the alert-plugin instance, determine whether there is an alert group association

[Improvement-4556][ui]Repair the workflow instance, click the browser to return to the previous page, always start the query from the first page

[Improvement-4556][ui]Repair the workflow instance, click the browser to return to the previous page, always start the query from the first page

[Improvement-4550][ui]Fix the problem of Uncaught (in promise) NavigationDuplicated: Avoided redundant navigation when clicking on the same route

[BUG][UI] fix ui createToken submit error.

* chore: Refactor code to fix code smell in alert-plugin module

* chore: Fix compile error

* chore: Fix static smell

[Fix-4544][UI] process-instance delete button display condition error

[BUG][UI] fix ui user authorization dialog

* [Fix-3233][api-server] Fix the bug when compile the code in Java9 env

* [Fix-3233][api-server] Fix the bug when compile the code in Java9 env

* [Fix-3233][api-server] Fix the bug when compile the code in Java9 env

* [Fix-3233][api-server] rollback

* [Fix-3233][api-server] delete release-docs/licenses/LICENSE-jsp-api-2.1-6.1.14.txt

* [Fix-3233][api-server] delete ant-1.6.5.jar core-3.1.1.jar jsp-api-2.1-6.1.14.jar

* [Fix-3233][api-server] delete LICENSE-ant-1.6.5.txt,LICENSE-core-3.1.1.txt

* [Fix-3233][api-server] delete maven repository address of ant-1.6.5.jar ,core-3.1.1.jar ,jsp-api-2-1-6.1.14.jar

* [DS-4506][LICENSE] upgrade the version of the commons-beanutils

* [DS-4506][LICENSE] upgrade the version of the commons-beanutils

* [DS-4506][LICENSE] upgrade the version of the commons-beanutils
Co-authored-by: N李长福 <changfu.li@dmall.com>