ENG-6301 fix undo with prior duplicate rows inserted.
Merge branch 'master' into ENG-6301-bulk-loader-crash
ENG-6301 add ee test for undo of inserted duplicates
Merge pull request #1361 from VoltDB/ENG-6301-bulk-loader-crash

Eng 6301 bulk loader crash
Merge branch 'master' of github.com:VoltDB/voltdb into ENG-6259-subselect-final