Human-friendly log message when LeaderAppointer assigns masters.
Remove hash file when grooming snapshot files.
Remove unused legacy member variables and parameters from RestoreAgent.
ENG-5269: Coalesce truncation snapshot only when command logging is enabled
during elastic join.
Restore the hashinator on recovery if there is command log to replay.
Use log4j instead of System.out for log messages in HostMessenger.
Merge pull request #853 from VoltDB/ENG-5269

Various improvements and ENG-5269