Fixes GH-36 (https://github.com/spring-projects/spring-integration-aws/issues/36) * Add ability to set `queueStopTimeout` for `SimpleMessageListenerContainer` in `SqsMessageDrivenChannelAdapter` * Update unit tests to test `queueStopTimeout` * Ensure that we don't override the default `queueStopTimeout` with `0` `long` * Upgrade to `SI-4.2.8`