Async store stop timeout should be much lower

What the heck? We have async store configured with 7200 seconds of timeout! That's 120 minutes, 2 hours!

executor.awaitTermination(asyncStoreConfig.getShutdownTimeout(), TimeUnit.SECONDS);

That should be milliseconds clearly to wait at the most 2 minutes.

I've spotted this when I saw core/ testsuite sometimes hanging and thread dumps show wait here.