web: update testERP5Web now that one-day-max policy is fixed

ref: 906761ed (erp5_web: change one-day-max policy max-age to 14400s, 2021-09-01)

bt5/erp5_web/TestTemplateItem/portal_components/test.erp5.testERP5Web.py

@@ -1883,7 +1883,7 @@ Hé Hé Hé!""", page.asText().strip())
     # Check cache control
     cache_control_header = response.getHeader('Cache-Control')
     self.assertEqual(cache_control_header,
-      'max-age=600, stale-while-revalidate=360000, stale-if-error=31536000, public')
+      'max-age=14400, stale-while-revalidate=360000, stale-if-error=31536000, public')
   
     # Check Vary
     cache_control_header = response.getHeader('Vary')