Always use v3 nova/neutron authentication

There is no need to test here whether v2 is disabled or not. V3
Authentication will always be available and we should just use that.

Change-Id: I0d2d76ebdf261917f1a2b23c65f0f843ae50f49a
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index ebb7570..bbfe7f3 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -468,19 +468,13 @@
 function create_nova_conf_neutron {
     iniset $NOVA_CONF DEFAULT network_api_class "nova.network.neutronv2.api.API"
 
-
-    if [ "$ENABLE_IDENTITY_V2" == "False" ]; then
-        iniset $NOVA_CONF neutron auth_plugin "v3password"
-        iniset $NOVA_CONF neutron auth_url "$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:$KEYSTONE_AUTH_PORT/v3"
-        iniset $NOVA_CONF neutron username "$Q_ADMIN_USERNAME"
-        iniset $NOVA_CONF neutron password "$SERVICE_PASSWORD"
-        iniset $NOVA_CONF neutron user_domain_name "default"
-    else
-        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 $NOVA_CONF neutron admin_tenant_name "$SERVICE_TENANT_NAME"
-    fi
+    iniset $NOVA_CONF neutron auth_plugin "v3password"
+    iniset $NOVA_CONF neutron auth_url "$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:$KEYSTONE_AUTH_PORT/v3"
+    iniset $NOVA_CONF neutron username "$Q_ADMIN_USERNAME"
+    iniset $NOVA_CONF neutron password "$SERVICE_PASSWORD"
+    iniset $NOVA_CONF neutron user_domain_name "Default"
+    iniset $NOVA_CONF neutron project_name "$SERVICE_TENANT_NAME"
+    iniset $NOVA_CONF neutron project_domain_name "Default"
     iniset $NOVA_CONF neutron auth_strategy "$Q_AUTH_STRATEGY"
     iniset $NOVA_CONF neutron region_name "$REGION_NAME"
     iniset $NOVA_CONF neutron url "${Q_PROTOCOL}://$Q_HOST:$Q_PORT"