Fix tests when vagrant isn't installed
Fix tests when vagrant isn't installed

pombredanne/fabtools,ahnjungho/fabtools,ronnix/fabtools,pahaz/fabtools,fabtools/fabtools,badele/fabtools,n0n0x/fabtools-python,wagigi/fabtools-python,hagai26/fabtools,prologic/fabtools,davidcaste/fabtools,AMOSoft/fabtools,bitmonk/fabtools,sociateru/fabtools