MT#7867 Api changes for invoice template per customer. For review.

lib/NGCP/Panel/Role/API/Customers.pm

@@ -84,6 +84,8 @@ sub hal_from_customer {
             $customer->passreset_email_template_id ? (Data::HAL::Link->new(relation => 'ngcp:passresetemailtemplates', href => sprintf("/api/emailtemplates/%d", $customer->passreset_email_template_id))) : (),
             $customer->invoice_email_template_id ? (Data::HAL::Link->new(relation => 'ngcp:invoiceemailtemplates', href => sprintf("/api/emailtemplates/%d", $customer->invoice_email_template_id))) : (),
             Data::HAL::Link->new(relation => 'ngcp:calls', href => sprintf("/api/calls/?customer_id=%d", $customer->id)),
+            $customer->invoice_template_id ? (Data::HAL::Link->new(relation => 'ngcp:invoicetemplates', href => sprintf("/api/invoicetemplates/%d", $customer->invoice_template_id))) : (),
+            Data::HAL::Link->new(relation => 'ngcp:calls', href => sprintf("/api/calls/?customer_id=%d", $customer->id)),
         ],
         relation => 'ngcp:'.$self->resource_name,
     );