Neutron: start to use nova's neutron configuration section

Commit 5cacad3508570ce70b1f9ef620e0508169687fda added support
of a neutron section. This updates the code to make use of
that section.

Change-Id: I86119476fde5066182d3aadcee5985019202647a
diff --git a/lib/neutron b/lib/neutron
index 6c0ca06..a7e1b38 100644
--- a/lib/neutron
+++ b/lib/neutron
@@ -302,13 +302,13 @@
 
 function create_nova_conf_neutron {
     iniset $NOVA_CONF DEFAULT network_api_class "nova.network.neutronv2.api.API"
-    iniset $NOVA_CONF DEFAULT neutron_admin_username "$Q_ADMIN_USERNAME"
-    iniset $NOVA_CONF DEFAULT neutron_admin_password "$SERVICE_PASSWORD"
-    iniset $NOVA_CONF DEFAULT neutron_admin_auth_url "$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:$KEYSTONE_AUTH_PORT/v2.0"
-    iniset $NOVA_CONF DEFAULT neutron_auth_strategy "$Q_AUTH_STRATEGY"
-    iniset $NOVA_CONF DEFAULT neutron_admin_tenant_name "$SERVICE_TENANT_NAME"
-    iniset $NOVA_CONF DEFAULT neutron_region_name "RegionOne"
-    iniset $NOVA_CONF DEFAULT neutron_url "http://$Q_HOST:$Q_PORT"
+    iniset $NOVA_CONF neutron admin_username "$Q_ADMIN_USERNAME"
+    iniset $NOVA_CONF neutron admin_password "$SERVICE_PASSWORD"
+    iniset $NOVA_CONF neutron admin_auth_url "$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:$KEYSTONE_AUTH_PORT/v2.0"
+    iniset $NOVA_CONF neutron auth_strategy "$Q_AUTH_STRATEGY"
+    iniset $NOVA_CONF neutron admin_tenant_name "$SERVICE_TENANT_NAME"
+    iniset $NOVA_CONF neutron region_name "RegionOne"
+    iniset $NOVA_CONF neutron url "http://$Q_HOST:$Q_PORT"
 
     if [[ "$Q_USE_SECGROUP" == "True" ]]; then
         LIBVIRT_FIREWALL_DRIVER=nova.virt.firewall.NoopFirewallDriver