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

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

Fix that the dynamic configuration is deleted on the server side but does not take effect on the agent. (#6255)
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

Fix Java.lang.ClassFormatError: Duplicate interface name "org/apache/skywalking/apm/agent/core/plugin/interceptor/enhance/EnhancedInstance" (#6173)

https://lists.apache.org/thread.html/r4f67a7ed880a493e4e82bd2e9a0c26a6e43c37bbfcdaebe7b1a340dc%40%3Cdev.skywalking.apache.org%3E

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

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

Fix DataCarrier's `org.apache.skywalking.apm.commons.datacarrier.buffer.Buffer` implementation isn't activated in `IF_POSSIBLE` mode. (#6048)

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

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

Co-authored-by: Nhuliang <hl@yumeitech.com.cn>
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* Polish the context and optimize the tag analyze

* Fix bug of new context codes.

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: Nkezhenxu94 <kezhenxu94@163.com>

Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

* [maven-release-plugin] prepare release v8.2.0

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

Add agent config `PROPERTIES_REPORT_PERIOD_FACTOR `, Avoid the instanceTraffic record properties is null. (#5688)

Co-authored-by: Nggnn <ggnn@ggnndeMacBook-Pro.local>
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>

Fix application start duration log "Failed to load class org.slf4j.impl.StaticLoggerBinder." (#5678)

* Fix application start duration log "Failed to load class "org.slf4j.impl.StaticLoggerBinder"." when use kafka reporter. because kafka reporter use slf4j-api, but no implementor for slf4j.

* Polishing.

* Adapter slf4j Logger of agent used to skywalking agent Logger.

* Make the comments more accurate.
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

* fix typo in ProfileTask

* Upgrade dependencies and make the JDK11 compiling passed.

* Update license and fix license check file.

* Add CI for JDK11 compiling.

* Update doc.

* Polish comments of the meter at the agent side.

* Fix code style.

* Fix typo and add comments.

* Fix comment.

* Fix sampling and Kafka reporter conflicting.

* Remove legacy codes.
Co-authored-by: Nkezhenxu94 <kezhenxu94@apache.org>