Merge pull request #3018 from edx/clintonb/ida-cache-prefix

Correcting cache key prefix for discovery service and IDA template

playbooks/roles/ansible-role-django-ida/templates/defaults/main.yml.j2

@@ -36,7 +36,7 @@
 {{ role_name|upper }}_CACHES:
   default:
     BACKEND:  'django.core.cache.backends.memcached.MemcachedCache'
-    KEY_PREFIX: 'default'
+    KEY_PREFIX: '{{ '{{' }} {{ role_name }}_service_name }}'
     LOCATION: '{{ '{{' }} {{ role_name|upper}}_MEMCACHE }}'
 
 {{ role_name|upper }}_VERSION: "master"

playbooks/roles/discovery/defaults/main.yml

@@ -48,7 +48,7 @@ DISCOVERY_MEMCACHE: [ 'memcache' ]
 DISCOVERY_CACHES:
   default:
     BACKEND:  'django.core.cache.backends.memcached.MemcachedCache'
-    KEY_PREFIX: 'default'
+    KEY_PREFIX: '{{ discovery_service_name }}'
     LOCATION: '{{ DISCOVERY_MEMCACHE }}'
 
 DISCOVERY_VERSION: "master"