In web site, the default language priority is 80 which is higher than 10 when target language is choose

According to

1. Browser is supposed to send something between 0 and 1

2. Localizer will set 2 or 3 for cases where user selected language

3. all print scripts seems set selected language priority to 10: ProductionOrder_printAsODT, ProductionPackingList_printAsODT ....

so here we introduce a convention to fix report language issue

1. site language priority should be 8(>3 and < 10)
2. print script should set selected language priority to 10