[maven-release-plugin] prepare release druid-0.6.43
[maven-release-plugin] prepare for next development iteration
Autoscaling fixes.

- Initial targetWorkerCount must be subject to pool size limits
- Use consistent workerSetupData for the entire autoscaling run
- Don't call terminate() when we have nothing to terminate
- Terminate obsolete workers even faster
[maven-release-plugin] prepare release druid-0.6.44
[maven-release-plugin] prepare for next development iteration