use "All" product category for the delivery product

data/delivery_demo.xml

@@ -11,7 +11,7 @@
 			<field name="name">Delivery by Deutsche Post</field>
 			<field name="default_code">Delivery</field>
 			<field name="type">service</field>
-			<field name="categ_id" ref="product_category_all"/>
+			<field name="categ_id" ref="product.product_category_all"/>
 			<field name="standard_price">0.0</field>
 			<field name="list_price">0.0</field>
 		</record>