guests/darwin: Require vagrant
guests/darwin: Require vagrant

sni/vagrant,carlosefr/vagrant,benh57/vagrant,vamegh/vagrant,crashlytics/vagrant,marxarelli/vagrant,PatrickLang/vagrant,jtopper/vagrant,sni/vagrant,chrisroberts/vagrant,mitchellh/vagrant,mwrock/vagrant,justincampbell/vagrant,sax/vagrant,PatrickLang/vagrant,lukebakken/vagrant,krig/vagrant,krig/vagrant,krig/vagrant,mwrock/vagrant,PatrickLang/vagrant,signed8bit/vagrant,bshurts/vagrant,benizi/vagrant,crashlytics/vagrant,crashlytics/vagrant,vamegh/vagrant,justincampbell/vagrant,bdwyertech/vagrant,sax/vagrant,chrisroberts/vagrant,taliesins/vagrant,tomfanning/vagrant,vamegh/vagrant,jtopper/vagrant,PatrickLang/vagrant,bshurts/vagrant,mitchellh/vagrant,benh57/vagrant,sni/vagrant,lukebakken/vagrant,marxarelli/vagrant,krig/vagrant,chrisroberts/vagrant,kamazee/vagrant,carlosefr/vagrant,gitebra/vagrant,taliesins/vagrant,carlosefr/vagrant,lukebakken/vagrant,justincampbell/vagrant,signed8bit/vagrant,justincampbell/vagrant,lukebakken/vagrant,bryson/vagrant,mitchellh/vagrant,benizi/vagrant,tomfanning/vagrant,jtopper/vagrant,bryson/vagrant,gitebra/vagrant,bdwyertech/vagrant,tomfanning/vagrant,kamazee/vagrant,marxarelli/vagrant,carlosefr/vagrant,marxarelli/vagrant,lonniev/vagrant,bryson/vagrant,jtopper/vagrant,benh57/vagrant,vamegh/vagrant,lonniev/vagrant,benizi/vagrant,gitebra/vagrant,mwrock/vagrant,taliesins/vagrant,bshurts/vagrant,crashlytics/vagrant,mitchellh/vagrant,sni/vagrant,mwrock/vagrant,bryson/vagrant,signed8bit/vagrant,bdwyertech/vagrant,bshurts/vagrant,benh57/vagrant,gitebra/vagrant,kamazee/vagrant,sax/vagrant,tomfanning/vagrant,bdwyertech/vagrant,benizi/vagrant,taliesins/vagrant,lonniev/vagrant,chrisroberts/vagrant,lonniev/vagrant,signed8bit/vagrant,kamazee/vagrant,sax/vagrant