added additional logging; minor change in test store classes
added new hintedHandoffSendHint test and remove old hintedHandOff test
refactored PerformParallelPutAction and related to ensure a slop is registered
more refactoring to make sure response is handled once and only once
added end-to-end test for slops
additional logging
additional slop fix
deprecate send hint serial
more commits on slop fix