geode-benchmarks are no longer logging geode logs

I think with the changes to have a separate geode-log4j module, the benchmarks stopped putting anything into the client, locator and server logs. They should be logging at the default logging level, just like they would in a customer environment.

It's not expected that info logging will have an impact since we don't log anything for normal operations at this level, but we should make sure it doesn't. In addition, logging statements are useful for debugging and developing benchmarks.