ENG-6898: ratelimit error log.
ENG-6898: fix tests.
ENG-6898: keep proc name in format to rate limit with procname in it.
Make OperatorExpression.refineValueType robust to cast expressions
Fix mispartitioned tuple error when INSERT contains non-trivial expression assigned to partitioning column
ENG-6898: remove %s from response.
Merge branch 'master' into ENG-6898
Merge pull request #1698 from VoltDB/ENG-6898

Eng 6898
Let StatementPartitioning keep producing useful diagnostics in compiler report.
Make compiler report produce "explain" output for expressions instead of JSON.
Merge branch 'master' into ENG-5929-insert-cast-exception
ENG-6962 multi-column distinct accidentally enabled for wrong answer
A better way to clean up memory when long running SQL has exception
Merge pull request #1707 from VoltDB/ENG-6970-memory

A better way to clean up memory when long running SQL has exception
Merge pull request #1705 from VoltDB/ENG-6962-redisable-multicolumn-distinct

ENG-6962 multi-column distinct accidentally enabled for wrong answer
Reduce the size of the cached plan in the EE; purge the string memory when queries finishes
Merge pull request #1701 from VoltDB/ENG-5929-insert-cast-exception

Allow non-trivial expressions assigned to partitioning column in `INSERT` statements.
Merge pull request #1708 from VoltDB/ENG-6970-memory

Reduce the size of the cached plan in the EE; purge the string memory wh...
Update killstragglers.sh