Bump JRuby version to 9.1.8.0 http://jruby.org/2017/03/06/jruby-9-1-8-0.html
Bump JRuby version to 9.1.8.0
http://jruby.org/2017/03/06/jruby-9-1-8-0.html

rsim/ruby-plsql,rsim/ruby-plsql,yahonda/ruby-plsql,yahonda/ruby-plsql