Added copyright to test

Author: basvanpoppel

app/code/Magento/OfflineShipping/Test/Mftf/Test/SalesRuleDiscountIsAppliedOnPackageValueForTableRateTest.xml

@@ -1,4 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?><!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
 <tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
     <test name="SalesRuleDiscountIsAppliedOnPackageValueForTableRateTest">
         <annotations>