slapos_accounting: Minor change

master/bt5/slapos_accounting/PathTemplateItem/service_module/slapos_instance_subscription/default_ssl.xml

@@ -54,6 +54,7 @@
                 <string>non_discountable_additional_price</string>
                 <string>priced_quantity</string>
                 <string>base_unit_price</string>
+                <string>quantity_unit</string>
               </tuple>
             </value>
         </item>