Ensure that API calls using anonymous user have the user object containing an…

Ensure that API calls using anonymous user have the user object containing an attribute 'known', set to False

lms/djangoapps/api_manager/courseware_access.py

 """ Centralized access to LMS courseware app """
+from django.contrib.auth.models import AnonymousUser
 from django.utils import timezone
 
 from courseware import courses, module_render
@@ -11,6 +12,10 @@ from xmodule.modulestore.django import modulestore
 from xmodule.modulestore.exceptions import ItemNotFoundError
 
 
+def _anonymous_known_flag(user):
+    if isinstance(user, AnonymousUser):
+        user.known = False
+
 def get_modulestore():
     return modulestore()
 
@@ -19,6 +24,7 @@ def get_course(request, user, course_id, depth=0, load_content=False):
     """
     Utility method to obtain course components
     """
+    _anonymous_known_flag(user)
     course_descriptor = None
     course_content = None
     course_key = get_course_key(course_id)
@@ -33,6 +39,7 @@ def get_course_child(request, user, course_key, content_id, load_content=False):
     """
     Return a course xmodule/xblock to the caller
     """
+    _anonymous_known_flag(user)
     child_descriptor = None
     child_content = None
     child_key = get_course_child_key(content_id)