* support user to customize an endpoint with toolkit.

* fix code style.

* add md.

* Update docs/en/setup/service-agent/java-agent/Application-toolkit-trace.md
Co-Authored-By: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* add test case.

* fix expecteddata.tml.

* fix data.

* fix expecteddata.tml.

* remove operationId in expectedData.yaml.
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>