slapos_subscription_request: Use appropriate service at the Invoice Line

master/bt5/slapos_subscription_request/PathTemplateItem/accounting_module/template_pre_payment_subscription_sale_invoice_transaction/1.xml

@@ -11,7 +11,7 @@
             <value>
               <tuple>
                 <string>use/trade/sale</string>
-                <string>resource/service_module/slapos_account_validation</string>
+                <string>resource/service_module/slapos_reservation_fee</string>
                 <string>quantity_unit/unit/piece</string>
                 <string>base_contribution/base_amount/invoicing/discounted</string>
                 <string>base_contribution/base_amount/invoicing/taxable</string>