single instance fixes ported from the jarv/gce branch

playbooks/roles/common/tasks/main.yml

@@ -21,7 +21,7 @@
   - update
   
 - name: Create staticfiles dir
-  file: path={{ app_base_dir }}/staticfiles state=directory owner=root group=adm mode=2775 
+  file: path={{ app_base_dir }}/staticfiles state=directory owner=www-data group=adm mode=2775 
   tags:
   - pre_install
   - update

playbooks/roles/edxapp/vars/main.yml

@@ -29,13 +29,13 @@ edxapp_generic_auth_config:  &edxapp_generic_auth
       'user':  'mongo'
   'MODULESTORE':
     'default':
-      'ENGINE': 'xmodule.modulestore.mongo.MongoModuleStore'
+      'ENGINE': 'xmodule.modulestore.mongo.DraftMongoModuleStore'
       'OPTIONS':  &lms_modulestore_default_options
         'collection':  'modulestore'
         'db':  'edxapp'
         'default_class':  'xmodule.hidden_module.HiddenDescriptor'
         'fs_root':  '/opt/wwc/data'
-        'host': [ 'localhost' ]
+        'host': [ 'localhost:11211' ]
         'password':  'password'
         'port': 27017
         'render_template':  'mitxmako.shortcuts.render_to_string'