Add utility script for pretty-printing json.
Add utility script for pretty-printing json.

mk23/jmxproxy,mk23/jmxproxy-test,mk23/jmxproxy-test,mk23/jmxproxy-test,mk23/jmxproxy,mk23/jmxproxy-test,mk23/jmxproxy,mk23/jmxproxy-test,mk23/jmxproxy-test,mk23/jmxproxy,mk23/jmxproxy,mk23/jmxproxy