Vagrantfile: add libvirt paravirtualization by default (works for VB >= 5.0)
Vagrantfile: add libvirt paravirtualization by default (works for VB >= 5.0)

Mirantis/solar,zen/solar,loles/solar,CGenie/solar,openstack/solar,CGenie/solar,loles/solar,pigmej/solar,zen/solar,Mirantis/solar,Mirantis/solar,loles/solar,dshulyak/solar,pigmej/solar,zen/solar,torgartor21/solar,openstack/solar,pigmej/solar,zen/solar,openstack/solar,Mirantis/solar,dshulyak/solar,loles/solar,torgartor21/solar