add source to Gemfile and remove redundant scenario
add source to Gemfile and remove redundant scenario

e2/aruba,dg-ratiodata/aruba,cucumber/aruba,e2/aruba,dg-ratiodata/aruba,mvz/aruba,mvz/aruba,AdrieanKhisbe/aruba,e2/aruba,ducthanh/aruba,maxmeyer/aruba,maxmeyer/aruba,jasnow/aruba,weedySeaDragon/aruba,AdrieanKhisbe/aruba,mattwynne/aruba,e2/aruba,AdrieanKhisbe/aruba,weedySeaDragon/aruba,weedySeaDragon/aruba,rapid7/aruba,rapid7/aruba,jasnow/aruba,weedySeaDragon/aruba,jasnow/aruba,ducthanh/aruba,dg-ratiodata/aruba,jasnow/aruba,ducthanh/aruba,AdrieanKhisbe/aruba,dg-ratiodata/aruba,ducthanh/aruba