Add ENABLE_DISCUSSION_EMAIL_DIGEST in api_manager

Conflicts:
	lms/djangoapps/api_manager/users/tests.py

lms/djangoapps/api_manager/users/tests.py

@@ -33,8 +33,13 @@ from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 from openedx.core.djangoapps.user_api.models import UserPreference
 from xmodule.modulestore.tests.factories import CourseFactory, ItemFactory
 
+from django.contrib.auth.models import User
+from openedx.core.djangoapps.user_api.models import UserPreference
+from notification_prefs import NOTIFICATION_PREF_KEY
+
 TEST_API_KEY = str(uuid.uuid4())
 
+
 class SecureClient(Client):
 
     """ Django test client using a "secure" connection. """

lms/djangoapps/api_manager/users/views.py

@@ -27,6 +27,7 @@ from django_comment_common.models import Role, FORUM_ROLE_MODERATOR
 from gradebook.models import StudentGradebook
 from instructor.access import revoke_access, update_forum_role
 from lang_pref import LANGUAGE_KEY
+from notification_prefs.views import enable_notifications
 from lms.lib.comment_client.user import User as CommentUser
 from lms.lib.comment_client.utils import CommentClientRequestError
 from notification_prefs.views import enable_notifications