enable jruby 1.9 mode on travis, fix rack env
enable jruby 1.9 mode on travis, fix rack env

kyontan/sinatra,jenalgit/sinatra,trexnix/sinatra,siberianbear/sinatra,mwpastore/sinatra,nicoayala/sinatra,Wirachmat/sinatra,porras/sinatra,miyazawatomoka/sinatra,emiliocorpus/sinatra,twanies/sinatra,kumji/sinatra,burningTyger/sinatra,JonMidhir/sinatra,porras/sinatra,ksw2599/sinatra,wzheng1/sinatra,d-bot/sinatra,jkowens/sinatra,RosenDimov/sinatra,mwpastore/sinatra,Wirachmat/sinatra,blambeau/sinatra,JonRowe/sinatra,howtolearntocode/sinatra,siberianbear/sinatra,JonRowe/sinatra,sinatra/sinatra,bmizerany/sinatra,JonMidhir/sinatra,kgrz/sinatra,frechei/sinatra,davydovanton/sinatra,howtolearntocode/sinatra,eileencodes/sinatra,Callygraphy/morrissey,frechei/sinatra,davydovanton/sinatra,trexnix/sinatra,QLGu/sinatra,dariubs/sinatra,kumji/sinatra,ABaldwinHunter/sinatra-classic,RosenDimov/sinatra,ABaldwinHunter/sinatra-classic,sinatra/sinatra,DoraALin/sinatra,jkowens/sinatra,cyberid41/sinatra,defsprite/sinatra,d-bot/sinatra,laplaceliu/sinatra,midorineko/sinatra,jkowens/sinatra,ganmacs/sinatra,gferguson-gd/sinatra,ryanshaw/sinatra,ktw1222/sinatra,burningTyger/sinatra,wzheng1/sinatra,lastcat/sinatra,mwpastore/sinatra,autopp/sinatra,sethuster/sinatra,twanies/sinatra,gferguson-gd/sinatra,cyberid41/sinatra,Rayheng/sinatra,burningTyger/sinatra,ksw2599/sinatra,ktw1222/sinatra,QLGu/sinatra,sethuster/sinatra,DoraALin/sinatra,nju520/sinatra,laplaceliu/sinatra,nju520/sinatra,eileencodes/sinatra,jenalgit/sinatra,ryanshaw/sinatra,autopp/sinatra,defsprite/sinatra,dariubs/sinatra,guidohcosta/sinatra,JonMidhir/sinatra,kyontan/sinatra,nicoayala/sinatra,emiliocorpus/sinatra,miyazawatomoka/sinatra,ganmacs/sinatra,lastcat/sinatra,midorineko/sinatra,marocchino/sinatra,guidohcosta/sinatra,Rayheng/sinatra