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

This reverts commit 93db72ef65d714e5e8d849fff558be3940992f2a, reversing
changes made to a56fe9b021e3543a24fdfc98f1c16704b41e62c6.

After looking more into this and thinking about what it would take to bring `riak-admin` up to speed to work in mixed cluster scenarios up until the point where people are no longer upgrading to some future version from 2.0 (*i.e.* a few years down the road) I am not sure it is worth the effort. This reverts the [previous](https://github.com/basho/node_package/pull/155) `node_package` change as the path of least resistance.