Add sane defaults for djfs.

Conflicts:
	playbooks/roles/edxapp/defaults/main.yml

playbooks/roles/edxapp/defaults/main.yml

@@ -15,6 +15,13 @@
 # Variables set to "None" will be converted to None
 # when the edxapp config is written to disk.
 
+# Bucket used for xblock file storage
+EDXAPP_XBLOCK_FS_STORAGE_BUCKET: "None"
+EDXAPP_XBLOCK_FS_STORAGE_PREFIX: "None"
+EDXAPP_DJFS:
+  type: 'osfs'
+  directory_root: '{{ edxapp_data_dir }}/django-pyfs/static/django-pyfs'
+  url_root : '/static/django-pyfs'
 
 EDXAPP_LMS_BASE: ""
 EDXAPP_PREVIEW_LMS_BASE: ""