Removed partition count from COW activate and fixed hasMore assertion.
ENG-4259 Make ee C++ test harness easier to disable tests.
ENG-4259 Unhook the CopyOnWriteContext count validation.
ENG-4259 Support delete flag (true not tested).
ENG-4259 Add unit testing for multi-COW with delete.
Merge pull request #468 from VoltDB/ENG-4259

ENG-4259 Support removal of rows on snapshot scan