ENG-5877 First cut catalog update upgrade.
Merge branch 'master' of github.com:VoltDB/voltdb into ENG-5877
ENG-5877 Positive and negative unit tests.
ENG-5877 Fix unit tests.
ENG-5877 Missing files.
ENG-5877: Moving community test class from pro to community.
Merge remote-tracking branch 'origin/master' into ENG-5877
Merge remote-tracking branch 'origin/master' into ENG-5877
ENG-5877: Shirnk some test code a bit.
Merge remote-tracking branch 'origin/master' into ENG-5877
Merge remote-tracking branch 'origin/master' into ENG-5877
Merge remote-tracking branch 'origin/master' into ENG-5877
Merge remote-tracking branch 'origin/master' into ENG-5877
ENG-6043 SnapshotSave detects better an ongoing snapshot
ENG-6043 handle better client response in snapshot save callbacks
Merge branch 'master' into ENG-6043
ENG-6043 improve snapshot messages serialization
Remove printstacktrace, add rate limit logging, ENG-6014
For ENG-6043, factor out test and error retrieval for SnapshotSave results
For ENG-6043, factor out one more location