ENG-7308 expalin is running now
ENG-7308 changed string matching to criteria
Duplicate the voter ddl and add two MatView group by query baselines
ENG-7297: Update TABLE and INDEX @Statistics correctly when we drop
the last table or index; these results will now be correctly empty
rather than having stale cached state.
Merge pull request #1863 from VoltDB/eng7297

ENG-7297, r=jhugg
Merge pull request #1857 from VoltDB/ENG-7308-Explain_notWorkingwithSQLCommands

ENG-7308 Explain command does not work in SQL query interface
Merge pull request #1861 from VoltDB/ENG-7323-plannertester-fix

Duplicate the voter ddl and add two MatView group by query baselines
Expand pre-compiled jars to all examples. Update readmes. Delete code I forgot to delete.
Merge remote-tracking branch 'origin/master' into examplefixup
Remove plannertester config for voltcache per feedback.