Added consistency check tool. Support single partition only
Updated ConsistencyCheck.java for new feature
wrap up the consistency tool
fixed a bug where the program does not sweep latest-version-consistent keys correctly
Added non-zoned cluster(multiple bootstrap url) support for consistency check; This uses value hash for comparing values instead of version object
Refactored the consistency-check tool
minor changes to consistency check
added test to consistency check; fixed a bug that ignored required write