v2.5.11.RELEASE

Change log:

fab754a Upgrade Versions; Prepare for Release
bf5d38e (2.5.x) GH-1675: Validation on @KafkaHandler Methods
f2ecd40 Fix Java 11 syntax in test code
0fe7fad Add repos to build script for plugins
09fb266 GH-1672: Option to Immediately Stop the Container
c54d4f5 GH-1673: Improve Docs for Default @KafkaHandler
23c0957 Fix doc typo