Update for FRENCH translation for Board Rules extension

Update for FRENCH translation for boardrules_acp.php
Update for FRENCH translation for boardrules_common.php
Update for FRENCH translation for boardrules_controller.php
Update for FRENCH translation for boardrules_install.php
Update for FRENCH translation for exceptions.php
Update for FRENCH translation for info_acp_boardrules.php
Update for FRENCH translation for permissions_boardrules.php