make run-class.sh working in Mac per ctasada

https://github.com/voldemort/voldemort/issues/132
Added unit tests to ensure that slops are registered for different asynchronous put operation failures
Bug fixes to HintedHandoffFailureTest and added more tests to handle 3-2-2 config. Removed SleepyForceFailStore
Tool to forklift data over for store migrations
Adding unit test for fork lift tool
Clarifying arbitrary choice to return BEFORE for equal vector clocks.
Forklift tool fix to equally spread fetches
Adding another Hinted handoff failure test to ensure main thread returns with failure when all replicas dont respond
Added bigger timeout to testNoSlopsOnAllReplicaFailures test and doing better exception handling in HintedHandoffFailureTest
Added Null pointer check in teardown of ReadOnlyStorageEngineTest
Merge commit 'db6ac447895255c84ef0e0cbd0303ffa6b45e05b'