Update nodetool to exit with appropriate return code if the rpc call fails
Update nodetool to exit with appropriate return code if the rpc call fails

biddyweb/riak,authbox-lib/riak,DavidAlphaFox/riak,wwezhuimeng/riak_search,elkingtonmcb/riak,xuejianhai/riak_search,wwezhuimeng/riak_search,GabrielNicolasAvellaneda/riak,xuejianhai/riak_search,glickbot/riak,basho/riak,planobe/riak,basho/riak_search,laurenrother/riak,basho/riak_search,planobe/riak,amyvmiwei/riak,xuejianhai/riak,yangchengjian/riak