[UI Test ] Sales Order with tax and discount (#10225)

* [new] UI Test for Sales Order

* [fix] Codacy fixed

* Update test_sales_order_with_discount_on_grand_total.js

* Update test_sales_order_with_taxes_and_charges.js
diff --git a/erpnext/tests/ui/tests.txt b/erpnext/tests/ui/tests.txt
index 88b6ca7..c21c671 100644
--- a/erpnext/tests/ui/tests.txt
+++ b/erpnext/tests/ui/tests.txt
@@ -12,6 +12,8 @@
 erpnext/selling/doctype/sales_order/tests/test_sales_order_with_multiple_delivery_date.js
 erpnext/selling/doctype/sales_order/tests/test_sales_order_with_item_wise_discount.js
 erpnext/selling/doctype/sales_order/tests/test_sales_order_with_multi_uom.js
+erpnext/selling/doctype/sales_order/tests/test_sales_order_with_discount_on_grand_total.js
+erpnext/selling/doctype/sales_order/tests/test_sales_order_with_taxes_and_charges.js
 erpnext/manufacturing/doctype/workstation/test_workstation.js
 erpnext/manufacturing/doctype/operation/test_operation.js
 erpnext/manufacturing/doctype/bom/test_bom.js