Merge branch 'ENG-4291-statementxml' into ENG-4291-ddlxml
Merge branch 'master' into ENG-4291-ddlxml
ENG-4291 (partial) Misc. getVoltXML-related cleanup/comments. Remove "isgrouped" attribute -- redundant w/ isEmpty test on "group by" expressions.
Truly minor code cleanup.
Merge branch 'master' into ENG-4291-misc
Merge pull request #368 from VoltDB/ENG-4291-misc

Eng 4291 misc -- 2 minor cleanup commits on top of ENG-4291-ddlxml