Improvements to default Storm Configuration

[Samuel Cozannet]

The default configuration provided for Storm Workers is very minimal. It appears that the below lines:

storm.messaging.netty.max_retries: 300
storm.messaging.netty.max_wait_ms: 2000
storm.messaging.netty.min_wait_ms: 100

makes communications a LOT more stable when used on AWS. It just says that the netty messaging should be a bit more flexible.

Another way of looking at it that would eventually be helpful for power users would be to provide a complete configuration file with default values (in the above, the default value for max_wait is 1000ms, not 2000ms but I added some latency management).

One can find this here : https://github.com/apache/storm/blob/master/conf/defaults.yaml

This is not urgent not required, but it would help and the cost is minimal I believe.