[FIX] unknow route must return 404 not 500
[FIX] unknow route must return 404 not 500

havt/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web