fix tests in node 0.12
fix tests in node 0.12

zhakui/async,wrenth04/async,renruixi/async,Qix-/async,KnottedRain/async,evdevgit/async,moander/async,ariesnah/async,r14r/fork_javascript_async,Zhang/async,mcanthony/async,SaiNadh001/async,xiebaochun/async,r14r-work/fork_javascript_async,lonely8rain/async,Connectlegendary/async,arigo-software/async,xiebaochun/async,Connectlegendary/async,rborisov/async,abhishekgahlot/async,sjclijie/async,caolan/async,rlugojr/async,megawac/async,jnordberg/async,abhishekgahlot/async,markyen/async,andalm/async,jaruba/async,SaiNadh001/async,bjlxj2008/async,DanieleTassone/async,navyxie/async,sjclijie/async,pandoraui/async,ecasilla/async,DaAwesomeP/async,Segeon-Kim/async,andalm/async,modulexcite/async,FrankSunnyvale/async,Qix-/async,RickyDan/async,hargasinski/async,scq000/async,r14r/fork_javascript_async,rlugojr/async,imjerrybao/async,chaddm/async,Segeon-Kim/async,evdevgit/async,JulianVolodia/async,llwanghong/async,renruixi/async,beni55/async,scq000/async,DDunc/async,hargasinski/async,ibakaidov/async,ecasilla/async,kolomiichenko/async,lonely8rain/async,KnottedRain/async,steverobb/async,garysye/async,XM-Right/async,mcanthony/async,ezubarev/async,chaddm/async,ariesnah/async,megawac/async,suguru03/async,llwanghong/async,tjwudi/async,zhhb/async,youprofit/async,kolomiichenko/async,carck/async,FrankSunnyvale/async,Kikobeats/async,zhakui/async,LeoYao/async,beni55/async,carck/async,zhhb/async,bjlxj2008/async,moander/async,navyxie/async,haggholm/async,ezubarev/async,pandoraui/async,jaruba/async,Kikobeats/async,suguru03/async,DDunc/async,rborisov/async,caolan/async,modulexcite/async,garysye/async,gypsydave5/async,DanieleTassone/async,steverobb/async,jamesjnadeau/async,tjwudi/async,XM-Right/async,jnordberg/async,LeoYao/async,RickyDan/async,Segeon-Kim/async,youprofit/async,jamesjnadeau/async,Zhang/async,imjerrybao/async,haggholm/async,ibakaidov/async,gypsydave5/async,wrenth04/async,arigo-software/async,markyen/async,r14r-work/fork_javascript_async,JulianVolodia/async,DaAwesomeP/async