ENG-5718 make join order matching case insensitive.
Merge branch 'master' into ENG-5718-mixedcasejoinorder
Merge branch 'master' into ENG-5718-mixedcasejoinorder
ENG-5718 forgive trailing comma in join order, add join order plan tests
Merge pull request #1091 from VoltDB/ENG-5718-mixedcasejoinorder

Eng 5718 mixedcasejoinorder