Stop building older versions in travis
Stop building older versions in travis

electrofelix/vagrant-libvirt,electrofelix/vagrant-libvirt,infernix/vagrant-libvirt,sendgrid-ops/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,pradels/vagrant-libvirt,electrofelix/vagrant-libvirt,infernix/vagrant-libvirt,infernix/vagrant-libvirt,pradels/vagrant-libvirt,sendgrid-ops/vagrant-libvirt