Fedora: install python3-libguestfs

All platforms are python3 now

Change-Id: Ie9f4c7e52f23a45bb8cf70a5fddf1b21a40d7000
diff --git a/lib/nova_plugins/hypervisor-libvirt b/lib/nova_plugins/hypervisor-libvirt
index d1b3d78..b0ae29e 100644
--- a/lib/nova_plugins/hypervisor-libvirt
+++ b/lib/nova_plugins/hypervisor-libvirt
@@ -117,7 +117,7 @@
             # Workaround for missing dependencies in python-libguestfs
             install_package python-libguestfs guestfs-data augeas augeas-lenses
         elif is_fedora; then
-            install_package python-libguestfs
+            install_package python3-libguestfs
         fi
     fi
 }