Fix mistake in libvirt definition for compute

Change-Id: I9351d4314c3c8156446f7a2fe56b18bb94f89a29
diff --git a/nova/map.jinja b/nova/map.jinja
index 1842234..81df0a8 100644
--- a/nova/map.jinja
+++ b/nova/map.jinja
@@ -45,6 +45,7 @@
         'libvirt_service': 'libvirt-bin',
         'bind': compute_bind_defaults,
         'debug': false,
+        'libvirt': [],
         'notification': false,
         'availability_zone': None,
         'aggregates': [],
@@ -64,6 +65,7 @@
         'libvirt_service': 'libvirtd',
         'bind': compute_bind_defaults,
         'debug': false,
+        'libvirt': [],
         'notification': false,
         'availability_zone': None,
         'identity': {