N°3663 Group exception classes in /application/exceptions

Original files kept for compatibility issues :
- core/coreexception.class.inc.php

There are remaining exceptions in /core/oql, but those files are generated

test/core/DBObjectTest.php

@@ -42,7 +42,6 @@ class DBObjectTest extends ItopDataTestCase
 	protected function setUp()
 	{
 		parent::setUp();
-		require_once(APPROOT.'core/coreexception.class.inc.php');
 		require_once(APPROOT.'core/dbobject.class.php');
 	}