GEODE-3638: cleanup minor issues found while prepping dunit talk My precheckin for PR #802 (GEODE-3638) is GREEN except for *org.apache.geode.internal.cache.tier.sockets.ClientHealthMonitorJUnitTest* which is still failing.
#802 introduces DistributedTestRule and fixes DistributedDisconnectRule along with some other minor cleanup of the dunit framework Thanks, Kirk
