Update JRuby to 9.0.0.0 on Travis CI
Update JRuby to 9.0.0.0 on Travis CI

:tada: http://jruby.org/2015/07/22/jruby-9-0-0-0.html

yujinakayama/transpec,yujinakayama/transpec,irfanah/transpec,irfanah/transpec