ISPN-4705 IllegalArgumentException: Segments must not be null or empty
ISPN-2042 Add easy trace logging facility to the test suite
ISPN-4745 Cluster Listener TX Batch incorrect when sending multiple
events

* Fixed typo where the events were sent inside the for loop
ISPN-4733 Investigate potential issues with System.nanoTime() overflow

* Fixed TestingUtil calculation for when to stop trying
* Changed stats to not error if nanotime is -1 (extreme edge case)
* Also fixed TransactionTable when clearing old txs
ISPN-4736 Implement efficient size operation in Hot Rod 2.0

* For local or replicated caches, it queries the cache itself to
calculate size of cache. Persistent stores are taken into account.
* For distributed caches, it uses M/R tasks to get the number of
total keys in the cluster.
ISPN-4470 Remove tabs and fix other formatting issues
ISPN-4470 Implement RemoteCache.size() w/ new Hot Rod size command

* Implement RemoteCache.size() using new Hot Rod 2.0 size operation.
* This provides an accurate element count that works with distributed
caches and persistent stores.
ISPN-4736 ISPN-4470 Size response code should be 0x2A