try to fix #4525


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21868 35612d4c-9d10-0410-837c-bf9dd1be60d7
can't delete action and criterion in Business rules see #4524


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21870 35612d4c-9d10-0410-837c-bf9dd1be60d7