Bug 6125 removing the section inside pm cache builder and added a new method inside the rbac class in order to remove the older session files

workflow/engine/methods/login/authentication.php

@@ -40,6 +40,8 @@ try {
     $pwd = trim($frm['USR_PASSWORD']);
   }
   $uid = $RBAC->VerifyLogin($usr , $pwd);
+  //cleaning session files older than 72 hours
+  $RBAC->cleanSessionFiles(72);
   $sPwd = 'currentPwd';
   switch ($uid) {
     //The user does not exist