optimize request - see #4463

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21618 35612d4c-9d10-0410-837c-bf9dd1be60d7
minor fix migration

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21621 35612d4c-9d10-0410-837c-bf9dd1be60d7