Bump rspec-core to 3.5.0
Bump rspec-core to 3.5.0

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