ENG-5712: Make the in-memory jarfile classloader work as a silent-upgrade source.
Merge remote-tracking branch 'origin/master' into ENG-5712
ENG-5712 Review responses.
Merge remote-tracking branch 'origin/master' into ENG-5712

Conflicts:
	src/frontend/org/voltdb/compiler/DDLCompiler.java
Merge branch 'origin/ENG-5712'
ENG-5712: Fix a dumb thing John H did that seemed smart at the time.
ENG-5711: Make sure we can run with version strings that have alpha in them.
Merge remote-tracking branch 'origin/ENG-5712' into ENG-5711