Merge pull request #16415 from edx/jmbowman/PLAT-1779

PLAT-1779 Fix CMS INSTALLED_APPS/model imports mismatch

cms/envs/common.py

@@ -1050,7 +1050,10 @@ INSTALLED_APPS = [
     # These are apps that aren't strictly needed by Studio, but are imported by
     # other apps that are.  Django 1.8 wants to have imported models supported
     # by installed apps.
+    'courseware',
+    'survey',
     'lms.djangoapps.verify_student.apps.VerifyStudentConfig',
+    'lms.djangoapps.completion.apps.CompletionAppConfig',
 
     # Microsite configuration application
     'microsite_configuration',