ENG-5570: Javadoc, cleanup and some jar upgrades (1/?)
Merge branch 'origin/master'
ENG-5570: JavaDoc PARTY!
Merge remote-tracking branch 'origin/master' into ENG-5570-javadoc
ENG-5570: Fix a JSON bug I introduced on the branch.
ENG-5570: Addressing review comments.
Merge remote-tracking branch 'origin/master' into ENG-5570-javadoc
Merge pull request #1087 from VoltDB/ENG-5570-javadoc

Javadoc survey and some light cleanup