Include recent vagrant release in tests (#1188)
Include recent vagrant release in tests (#1188)

Update pin for most recent vagrant release.
vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,pradels/vagrant-libvirt,electrofelix/vagrant-libvirt,electrofelix/vagrant-libvirt,pradels/vagrant-libvirt,electrofelix/vagrant-libvirt