N°8699 - attributedef.class.inc.php to PSR4 [3-PSR4]

- Add namespaces
- Add use statements
- reformat code

sources/Core/AttributeDefinition/MissingColumnException.php

@@ -1,4 +1,12 @@
 <?php
+/*
+ * @copyright   Copyright (C) 2010-2024 Combodo SAS
+ * @license     http://opensource.org/licenses/AGPL-3.0
+ */
+
+namespace Combodo\iTop\Core\AttributeDefinition;
+
+use Exception;
 
 /**
  * MissingColumnException - sent if an attribute is being created but the column is missing in the row