Remove duplicate keys for caches.

playbooks/roles/edxapp/defaults/main.yml

@@ -802,8 +802,6 @@ edxapp_generic_auth_config:  &edxapp_generic_auth
 generic_cache_config: &default_generic_cache
   BACKEND:  'django.core.cache.backends.memcached.MemcachedCache'
   KEY_FUNCTION:  'util.memcache.safe_key'
-  KEY_PREFIX: 'default'
-  LOCATION: "{{ EDXAPP_MEMCACHE }}"
 
 generic_env_config:  &edxapp_generic_env
   ECOMMERCE_PUBLIC_URL_ROOT: "{{ EDXAPP_ECOMMERCE_PUBLIC_URL_ROOT }}"
@@ -888,23 +886,29 @@ generic_env_config:  &edxapp_generic_env
     default:
       <<: *default_generic_cache
       KEY_PREFIX: 'default'
+      LOCATION: "{{ EDXAPP_MEMCACHE }}"
       VERSION: "{{ EDXAPP_DEFAULT_CACHE_VERSION }}"
     general:
       <<: *default_generic_cache
       KEY_PREFIX:  'general'
+      LOCATION: "{{ EDXAPP_MEMCACHE }}"
     mongo_metadata_inheritance:
       <<: *default_generic_cache
       KEY_PREFIX:  'mongo_metadata_inheritance'
       TIMEOUT: 300
+      LOCATION: "{{ EDXAPP_MEMCACHE }}"
     staticfiles:
       <<: *default_generic_cache
       KEY_PREFIX: "{{ ansible_hostname|default('staticfiles') }}_general"
+      LOCATION: "{{ EDXAPP_MEMCACHE }}"
     configuration:
       <<: *default_generic_cache
       KEY_PREFIX: "{{ ansible_hostname|default('configuration') }}"
+      LOCATION: "{{ EDXAPP_MEMCACHE }}"
     celery:
       <<: *default_generic_cache
       KEY_PREFIX:  'celery'
+      LOCATION: "{{ EDXAPP_MEMCACHE }}"
       TIMEOUT: "7200"
     course_structure_cache:
       <<: *default_generic_cache