MC-19366: Fixes that field name validation was executed although it should not

Author: jean-bernard-valentaten

Magento2/ruleset.xml

@@ -526,11 +526,15 @@
         <severity>6</severity>
         <type>warning</type>
     </rule>
-    <!-- Field name validation deactivated as per request https://github.com/magento/magento-coding-standard/pull/141#discussion_r323349939 -->
-<!--    <rule ref="Magento2.GraphQL.ValidFieldName">-->
-<!--        <severity>6</severity>-->
-<!--        <type>warning</type>-->
-<!--    </rule>-->
+    <rule ref="Magento2.GraphQL.ValidFieldName">
+        <!--
+         * Field name validation deactivated as per request
+         * https://github.com/magento/magento-coding-standard/pull/141#discussion_r323349939
+        -->
+        <exclude name="Magento2.GraphQL.ValidFieldName" />
+        <severity>6</severity>
+        <type>warning</type>
+    </rule>
     <rule ref="Magento2.GraphQL.ValidArgumentName">
         <severity>6</severity>
         <type>warning</type>