Fix fwaas service plugin location

This was missed during the services split.

Change-Id: I8b51ca2c6ef734bf2747cec48a2f751eb682afe5
diff --git a/lib/neutron_plugins/services/firewall b/lib/neutron_plugins/services/firewall
index ce1f93f..a1c13ed 100644
--- a/lib/neutron_plugins/services/firewall
+++ b/lib/neutron_plugins/services/firewall
@@ -16,7 +16,7 @@
     cp $NEUTRON_DIR/etc/fwaas_driver.ini $FWAAS_DRIVER_CONF_FILENAME
 
     iniset_multiline $FWAAS_DRIVER_CONF_FILENAME fwaas enabled True
-    iniset_multiline $FWAAS_DRIVER_CONF_FILENAME fwaas driver "neutron.services.firewall.drivers.linux.iptables_fwaas.IptablesFwaasDriver"
+    iniset_multiline $FWAAS_DRIVER_CONF_FILENAME fwaas driver "neutron_fwaas.services.firewall.drivers.linux.iptables_fwaas.IptablesFwaasDriver"
 }
 
 function neutron_fwaas_stop {