Fixed libvirt package name for parallels virt_type

There is no special libvirt metapackage for Virtuozzo
as per [1]. On Virtuozzo Linux distribution (kind of RHEL
family) `libvirt` package provides all necessary requirements.

[1] http://libvirt.org/packaging.html

Change-Id: I1545114470585c7d4e62e4c7a5215a2ee73d6d6f
Signed-off-by: Pavel Glushchak <pglushchak@virtuozzo.com>

manifests/compute/libvirt/services.pp

@@ -55,6 +55,9 @@ class nova::compute::libvirt::services (
         'qemu': {
           $libvirt_package_name_real = "${::nova::params::libvirt_daemon_package_prefix}kvm"
         }
+        'parallels': {
+          $libvirt_package_name_real = $::nova::params::libvirt_package_name
+        }
         default: {
           $libvirt_package_name_real = "${::nova::params::libvirt_daemon_package_prefix}${libvirt_virt_type}"
         }