Fix scheduler_default_filters usage

The scheduler_default_filters config option moved out of the
DEFAULT option group into a more specific group, and the old
option is deprecated as a result so we need to update our usage.

Change-Id: I5d6574d19c3f16abadddb19f34cb645dcdcc07f4
diff --git a/lib/nova b/lib/nova
index e580abb..9c3ba33 100644
--- a/lib/nova
+++ b/lib/nova
@@ -454,7 +454,7 @@
     iniset $NOVA_CONF wsgi api_paste_config "$NOVA_API_PASTE_INI"
     iniset $NOVA_CONF DEFAULT rootwrap_config "$NOVA_CONF_DIR/rootwrap.conf"
     iniset $NOVA_CONF DEFAULT scheduler_driver "$SCHEDULER"
-    iniset $NOVA_CONF DEFAULT scheduler_default_filters "$FILTERS"
+    iniset $NOVA_CONF filter_scheduler enabled_filters "$FILTERS"
     iniset $NOVA_CONF DEFAULT default_floating_pool "$PUBLIC_NETWORK_NAME"
     if [[ $SERVICE_IP_VERSION == 6 ]]; then
         iniset $NOVA_CONF DEFAULT my_ip "$HOST_IPV6"