rbd/pools: support RH libvirt package name
rbd/pools: support RH libvirt package name

On Red Hat systems, libvirt package is not libvirt-bin.
So we need to support both Debian & RH systems to manage RBD
configuration.

goneri/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,redhat-cip/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,goneri/puppet-openstack-cloud,Prophidys/puppet-openstack-cloud,gwdg/puppet-openstack-cloud,redhat-cip/puppet-openstack-cloud,Prophidys/puppet-openstack-cloud,redhat-cip/puppet-openstack-cloud,Prophidys/puppet-openstack-cloud