Improve the development instructions (#1282)
Improve the development instructions (#1282)

Add some details to ensure correct execution of the rspec tests locally.

Closes: #1064
vagrant-libvirt/vagrant-libvirt,electrofelix/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,electrofelix/vagrant-libvirt,electrofelix/vagrant-libvirt