For ENG-6209, add logging to give more visiblity into auto-snapshot activity and fix a bug where failed snapshot initiations don't end up invoking an error callback
Merge pull request #1316 from VoltDB/ENG-6209

For ENG-6209, add logging to give more visiblity into auto-snapshot acti...
V4.3
Fix a regressed order by test that never should have passed?
Merge branch 'fix-order-by-test' into ENG-6090-subquery-test-and-fix