Revert snapshot debug messages to the debug level.
ENG-6057: Use the VoltTableRow method that preserves milliseconds when
converting to java.sql.Timestamp rather than old broken cowboy logic.
Merge pull request #1289 from VoltDB/eng6057

ENG-6057: Use the VoltTableRow method that preserves milliseconds when converting to java.sql.Timestamp rather than old broken cowboy logic.

r=rbetts (YES, RUN!)
ENG-6158: Set the elastic index as complete on the new table after truncation.

The new table is empty, so nothing to index. Mark it as complete so that
subsequent index reads can succeed.
Merge pull request #1290 from VoltDB/truncate-table-fix

ENG-6158: Set the elastic index as complete on the new table after truncation
Merge branch 'master' into fourtwo-integration