Merge pull request #1467 from VoltDB/ENG-6570-clean-temptable

Eng 6570 clean temptable
Merge branch 'master' of github.com:VoltDB/voltdb into performance-aws-xin
Fix the licensecheck
Merge branch 'master' of github.com:VoltDB/voltdb into ENG-6572-inline-limit-orderby
Merge branch 'ENG-6572-inline-limit-orderby' into performance-aws-xin