AWS settings hook for addl installed apps + lms/wsgi_apache.py

wsgi_apache.py passes an apache env variable for SERVICE_VARIANT
to the os environment, where it's normally set when we use gunicorn

lms/envs/aws.py

@@ -138,6 +138,10 @@ MKTG_URL_LINK_MAP.update(ENV_TOKENS.get('MKTG_URL_LINK_MAP', {}))
 #Timezone overrides
 TIME_ZONE = ENV_TOKENS.get('TIME_ZONE', TIME_ZONE)
 
+#Additional installed apps
+for app in ENV_TOKENS.get('ADDL_INSTALLED_APPS', []):
+    INSTALLED_APPS += (app,)
+
 for feature, value in ENV_TOKENS.get('MITX_FEATURES', {}).items():
     MITX_FEATURES[feature] = value
 

lms/wsgi_apache.py

+import os
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "lms.envs.aws")
+# This application object is used by the development server
+# as well as any WSGI server configured to use this file.
+from django.core.wsgi import WSGIHandler
+_application = WSGIHandler()
+
+def application(environ, start_response):
+    #copy SERVICE_VARIANT from apache environ to os environ 
+    os.environ.setdefault("SERVICE_VARIANT", environ.get("SERVICE_VARIANT", "lms"))
+    return _application(environ, start_response)
+
+from django.conf import settings
+from xmodule.modulestore.django import modulestore
+
+for store_name in settings.MODULESTORE:
+    modulestore(store_name)