Revert "Merge branch 'feature/nodetool-zero-arg-rpc' into develop"

This reverts commit 93db72ef65d714e5e8d849fff558be3940992f2a, reversing
changes made to a56fe9b021e3543a24fdfc98f1c16704b41e62c6.
Merge pull request #156 from basho/revert-zero-arg-rpc-change

Revert "Merge branch 'feature/nodetool-zero-arg-rpc' into develop"