investigate Updating checkpoint interval defaults

[conniey]

from @jsquire's investigation in .NET, to change our current defaults:

• Default load balancing strategy: Greedy (currently Balanced)
• Default ownership interval: 2 minutes (currently 30 seconds)
• Default load balancing interval: 30 seconds (currently 10 seconds)

Currently, you'd have to set these manually:

        EventProcessorClientBuilder eventProcessorClientBuilder = new EventProcessorClientBuilder()
             ...
            .loadBalancingStrategy(LoadBalancingStrategy.GREEDY)
            .partitionOwnershipExpirationInterval(Duration.ofMinutes(2))
            .loadBalancingUpdateInterval(Duration.ofSeconds(30));

Based on his investigations,

"the root cause of the load balancing cycle in the processor not performing quickly enough to retain ownership, leading to partitions bouncing around and being orphaned for a period of time.
These seem to be caused by Storage operations having latency and/or requiring retries, the host machine being under-provisioned leading to contention in the thread pool when scheduling continuations, or both.