[-] BO : fix parameters missing between AdminController and HelperList 2

[-] BO : fix parameters missing between AdminController and HelperList - part 2

Hi,
See pull request #2157

Some pagination parameters are not send from AdminController To HelperList.
With this modification, we can choose the default pagination for the list by controller.

These lines are missing in renderList():
$helper->_default_pagination = $this->_default_pagination;
$helper->_pagination = $this->_pagination;

_default_pagination and _pagination must be public.