Make ignored vagrant network options a constant
Make ignored vagrant network options a constant

marxarelli/vagrant,gitebra/vagrant,marxarelli/vagrant,sni/vagrant,mitchellh/vagrant,mitchellh/vagrant,bryson/vagrant,gitebra/vagrant,marxarelli/vagrant,sni/vagrant,marxarelli/vagrant,chrisroberts/vagrant,chrisroberts/vagrant,chrisroberts/vagrant,mitchellh/vagrant,bryson/vagrant,chrisroberts/vagrant,sni/vagrant,sni/vagrant,mitchellh/vagrant,bryson/vagrant,gitebra/vagrant,gitebra/vagrant,bryson/vagrant