Neutron FWaaS: Use generated configuration files if available

Generate the Neutron FWaaS sample config files by using the oslo
generator. The files are generated with a .sample extension and
replace the static example configuration files.

Once the generation code is delivered, the static config files
will be removed.

Change-Id: Ic8208850a27408c8fbeed80ecdb43345aa7dfaa4
Related-blueprint: autogen-neutron-conf-file
Partial-bug: #1199963
Depends-On: I8e9113dfb88e5290f6eedd012d1a52fc35c3c88c
diff --git a/lib/neutron_plugins/services/firewall b/lib/neutron_plugins/services/firewall
index 1d81a21..2b7f32d 100644
--- a/lib/neutron_plugins/services/firewall
+++ b/lib/neutron_plugins/services/firewall
@@ -14,8 +14,11 @@
 }
 
 function neutron_fwaas_configure_driver {
+    # Uses oslo config generator to generate FWaaS sample configuration files
+    (cd $NEUTRON_FWAAS_DIR && exec ./tools/generate_config_file_samples.sh)
+
     FWAAS_DRIVER_CONF_FILENAME=/etc/neutron/fwaas_driver.ini
-    cp $NEUTRON_FWAAS_DIR/etc/fwaas_driver.ini $FWAAS_DRIVER_CONF_FILENAME
+    cp $NEUTRON_FWAAS_DIR/etc/fwaas_driver.ini.sample $FWAAS_DRIVER_CONF_FILENAME
 
     iniset_multiline $FWAAS_DRIVER_CONF_FILENAME fwaas enabled True
     iniset_multiline $FWAAS_DRIVER_CONF_FILENAME fwaas driver "neutron_fwaas.services.firewall.drivers.linux.iptables_fwaas.IptablesFwaasDriver"