Fix 5 small tickets from DIST-18 mostly around community/pro errors.

ENG-5654 AAUIW JMX errors to be non-fatalV4.0.2 
ENG-5525 voltdb recover on community edition gives bad error messageV4.0.2 
ENG-5524 Calling snapshot save/restore on community gives wrong error messageV4.0.2 
ENG-5526 voltdb rejoin on community edition gives voltdb3 usage messageV4.0.2 
ENG-5527 Able to call voltdb add and rejoin -b in community edition