Redis Lettuce span UI doesn't show detailed Redis command parameters in 'db.statement' field (#6614)

1. Add plugin test for KafkaProducer.send(record).
2. Add exception checking test cases for CallbackInterceptor.

Resolves #6481

* [maven-release-plugin] prepare release v8.4.0

* [maven-release-plugin] prepare for next development iteration

* Fix bug that rocketmq-plugin set the wrong tag.

* Update CHANGES.md
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Trace method(clearScrollAsync) for elasticsearch-6.x-plugin and polishing elasticsearch-6.x-scenario. (#6031)

* Polish elasticsearch-6.x-scenario.

Add interceptors of method(analyze, searchScroll, clearScroll, searchTemplate and deleteByQuery) for elasticsearch-6.x-plugin. (#5962)

* add null conditional operators on these 3 files . To aviod some agent exception of Oracle jdbc.

* Add a line in Java Agent section of CHANGES.md file
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* Fix jdk-http and okhttp-3.x did not overwrite the old trace header.

* Update CHANGES.md.

* [maven-release-plugin] prepare release v8.3.0

* [maven-release-plugin] prepare for next development iteration

* Fix okhttp-3.x and async-http-client-2.x did not overwrite the old trace header.

* support spring-kafka 1.3.x and add test

* add spring-kafka-1.3.x-scenario to github workflow

* change kafka-plugin FAQ

* add supported versions

* update CHANGES.md

* Add the plugin for mssql-jtds 1.x plugin.