added: simple semi-randomized tests for Props.java
next: more tests
added: @Override to make unnecessary warnings go away in Props.java
edited: PropsTest.java now is simpler and does, pretty much the same thing
Displays prompt "> " with every return stroke in the text-shell
Changed XmX1500M back to XmX2G in voldermort-server.sh
Merge pull request #161 from bhsaurabh/master

Cleaner client shell
Merge pull request #160 from Ahimta/master

More tests for Utils.Props.java
Contributed by Ahimta
Cleanup expected exception stack trace in logs

1) Expected exception stack trace is logged at warning level.
   This causes the monitoring system(EKG) to pickup these stack traces.
   Do not log these stack trace unless debug is enabled or if the
   exception has inner exception
2) When a node is unavailable in the resource pool map, ignore the
   cleanup. This can happen because the resource pool map used by
   the failure detector and the other requests are different.