Update ring builder filenames in Swift config

Update Swift config playbook to use correct name of Swift ring
builer file. Those are the names generated if one follows document in
doc/swift-guide.rst

TrivialFix

Change-Id: If1d713e3cccc851ef6f2cc3cb5a736b43fa26957

ansible/roles/swift/tasks/config.yml

@@ -141,9 +141,9 @@
     dest: "{{ node_config_directory }}/swift/{{ item }}"
     backup: yes
   with_items:
-    - "account.ring"
+    - "account.builder"
     - "account.ring.gz"
+    - "container.builder"
     - "container.ring.gz"
-    - "container.ring"
-    - "object.ring"
+    - "object.builder"
     - "object.ring.gz"