Create "/certificates" folder when creating course

In order to avoid issues when creating a course and different sessions

BT#15609

Author: jmontoyaa

main/inc/lib/add_course.lib.inc.php

@@ -704,6 +704,7 @@ public static function fill_db_course(
         $files = [
             ['path' => '/shared_folder', 'title' => get_lang('UserFolders'), 'filetype' => 'folder', 'size' => 0],
             ['path' => '/chat_files', 'title' => get_lang('ChatFiles'), 'filetype' => 'folder', 'size' => 0],
+            ['path' => '/certificates', 'title' => get_lang('CertificatesFiles'), 'filetype' => 'folder', 'size' => 0],
         ];
 
         $counter = 1;
@@ -730,7 +731,6 @@ public static function fill_db_course(
                 ['path' => '/audio', 'title' => get_lang('Audio'), 'filetype' => 'folder', 'size' => 0],
                 ['path' => '/flash', 'title' => get_lang('Flash'), 'filetype' => 'folder', 'size' => 0],
                 ['path' => '/video', 'title' => get_lang('Video'), 'filetype' => 'folder', 'size' => 0],
-                ['path' => '/certificates', 'title' => get_lang('Certificates'), 'filetype' => 'folder', 'size' => 0],
             ];
 
             foreach ($files as $file) {