Release PR for v2.9.0 (#274)

* Release PR for v2.9.0

* update changelog

Author: bhautikpip

CHANGELOG.md

@@ -1,5 +1,26 @@
 # Change Log
 
+## 2.9.0
+- Added aggregate javadoc plugin
+[PR 242](https://github.com/aws/aws-xray-sdk-java/pull/242)
+- Configurtion to always create trace ID
+[PR 243](https://github.com/aws/aws-xray-sdk-java/pull/243)
+- Fix sampling rules not being deleted
+[PR 244](https://github.com/aws/aws-xray-sdk-java/pull/244)
+- Lock accesses to entities
+[PR 250](https://github.com/aws/aws-xray-sdk-java/pull/250)
+- Added support for reading header from environment and system properties
+[PR 252](https://github.com/aws/aws-xray-sdk-java/pull/252)
+- Added log correlation support to ECS plugin
+[PR 263](https://github.com/aws/aws-xray-sdk-java/pull/263)
+- Added JavaTimeModule for entity object mapper
+[PR 267](https://github.com/aws/aws-xray-sdk-java/pull/267)
+- Addded enhanced metadata parsing for Oracle DBs
+[PR 270](https://github.com/aws/aws-xray-sdk-java/pull/270)
+- Added support to set log group via environment variable
+[PR 273](https://github.com/aws/aws-xray-sdk-java/pull/273)
+
+
 ## 2.8.0 - 2020-11-24
 - Optimized creating, parsing, and serializing trace IDs
 [PR 212](https://github.com/aws/aws-xray-sdk-java/pull/212)