Restore ad hoc SP DML functionality, beef up plannertester aggs suite, pare down PlannerTestAideDeCamp.
Merge branch 'master' into ENG-4076
Merge branch 'master' into ENG-4076
Comment tweak re:r=jhugg
Merge pull request #538 from VoltDB/ENG-4076

Depends on pro branch. Merge that first.