adding defaults for grade downloads

playbooks/roles/edxapp/defaults/main.yml

@@ -68,6 +68,7 @@ EDXAPP_MITX_FEATURES:
   SUBDOMAIN_BRANDING: false
   SUBDOMAIN_COURSE_LISTINGS: false
   PREVIEW_LMS_BASE: $EDXAPP_PREVIEW_LMS_BASE
+  ENABLE_S3_GRADE_DOWNLOADS: true
 
 EDXAPP_BOOK_URL: ''
 # This needs to be set to localhost
@@ -110,6 +111,11 @@ EDXAPP_MKTG_URL_LINK_MAP: {}
 # Example: xxxxx.cloudfront.net/static/
 EDXAPP_STATIC_URL_BASE: "/static/"
 
+# Settings for Grade downloads
+EDXAPP_GRADE_STORAGE_TYPE: 'localfs'
+EDXAPP_GRADE_BUCKET: 'edx-grades'
+EDXAPP_GRADE_ROOT_PATH: '/tmp/edx-s3/grades'
+
 #-------- Everything below this line is internal to the role ------------
 
 #Use YAML references (& and *) and hash merge <<: to factor out shared settings
@@ -262,6 +268,10 @@ edxapp_generic_auth_config:  &edxapp_generic_auth
   CELERY_BROKER_PASSWORD: $EDXAPP_CELERY_PASSWORD
 
 generic_env_config:  &edxapp_generic_env
+  GRADES_DOWNLOAD:
+    STORAGE_TYPE: $EDXAPP_GRADE_STORAGE_TYPE
+    BUCKET: $EDXAPP_GRADE_BUCKET
+    ROOT_PATH: $EDXAPP_GRADE_ROOT_PATH
   STATIC_URL_BASE: $EDXAPP_STATIC_URL_BASE
   STATIC_ROOT_BASE: $edxapp_staticfile_dir
   LMS_BASE: $EDXAPP_LMS_BASE