Add test for version-origin when version not found in `rbenv-exec`
Add test for version-origin when version not found in `rbenv-exec`

cehoffman/rbenv,yyyc514/rbenv,genome-vendor/pyenv,docwhat/rbenv,yyyc514/rbenv,sebhahn/pyenv,nodenv/nodenv,sstephenson/rbenv,BanzaiMan/pyenv,pyenv/pyenv,sebhahn/pyenv,jrolfs/nodenv,cehoffman/pyenv,cehoffman/rbenv,jasonkarns/rbenv,cehoffman/pyenv,syndbg/goenv,zmwangx/pyenv,viclim/rbenv,Angeldude/rbenv,jeremy/rbenv,yyuu/pyenv,sstephenson/rbenv,jeremy/rbenv,sebhahn/pyenv,bradynpoulsen/rbenv,cehoffman/nodenv,jasonkarns/rbenv,genome-vendor/pyenv,jasonkarns/rbenv,docwhat/rbenv,viclim/rbenv,rbenv/rbenv,cehoffman/rbenv,syndbg/goenv,sstephenson/rbenv,syndbg/goenv,bradynpoulsen/rbenv,Angeldude/rbenv,syndbg/goenv,yyuu/pyenv,BanzaiMan/pyenv,bradynpoulsen/rbenv,jeremy/rbenv,docwhat/rbenv,pyenv/pyenv,pyenv/pyenv,OiNutter/nodenv,OiNutter/nodenv,viclim/rbenv,Angeldude/rbenv,nodenv/nodenv,cehoffman/nodenv,rbenv/rbenv,yyyc514/rbenv,zmwangx/pyenv,jrolfs/nodenv