Eagerly load all modules when reading the course from xml, so that users who are already on a problem page can check their answers

lms/envs/common.py

@@ -152,6 +152,7 @@ MODULESTORE = {
         'OPTIONS': {
             'data_dir': DATA_DIR,
             'default_class': 'xmodule.hidden_module.HiddenDescriptor',
+            'eager': True,
         }
     }
 }