Fix stop containers task in Swift rolling restart

When applying upgrade action on Swift, rolling restart was not
stopping containers on the right hosts if all Swift containers
were not deployed on the same host.

This patch proposes to use the same kind of detection already
done in reconfigure and associate a container to a group.

Closes-Bug: 1899280
Change-Id: I75e31554228350ff2e1c2f53ff864f8649c8d618
Signed-off-by: Benjamin FÜHRMANN <benjamin.fuhrmann@gmail.com>

ansible/roles/swift/tasks/rolling_upgrade.yml

 ---
+- name: Prepare Swift containers list
+  set_fact:
+    swift_containers:
+      - { name: swift_account_server, group: swift-account-server }
+      - { name: swift_account_auditor, group: swift-account-server }
+      - { name: swift_account_replicator, group: swift-account-server }
+      - { name: swift_account_reaper, group: swift-account-server }
+      - { name: swift_rsyncd, group: swift-account-server }
+      - { name: swift_container_server, group: swift-container-server }
+      - { name: swift_container_auditor, group: swift-container-server }
+      - { name: swift_container_replicator, group: swift-container-server }
+      - { name: swift_container_updater, group: swift-container-server }
+      - { name: swift_rsyncd, group: swift-container-server }
+      - { name: swift_object_server, group: swift-object-server }
+      - { name: swift_object_auditor, group: swift-object-server }
+      - { name: swift_object_replicator, group: swift-object-server }
+      - { name: swift_object_updater, group: swift-object-server }
+      - { name: swift_object_expirer, group: swift-object-server }
+      - { name: swift_rsyncd, group: swift-object-server }
+
 # Upgrade swift storage nodes first
 - include_tasks: config.yml
   when: inventory_hostname in groups['swift-account-server'] or
@@ -12,25 +32,10 @@
   become: true
   kolla_docker:
     action: "stop_container"
-    name: "{{ item }}"
+    name: "{{ item.name }}"
+  when: inventory_hostname in groups[item.group]
   with_items:
-    - "swift_rsyncd"
-    - "swift_account_server"
-    - "swift_account_auditor"
-    - "swift_account_replicator"
-    - "swift_account_reaper"
-    - "swift_container_server"
-    - "swift_container_auditor"
-    - "swift_container_replicator"
-    - "swift_container_updater"
-    - "swift_object_server"
-    - "swift_object_auditor"
-    - "swift_object_replicator"
-    - "swift_object_updater"
-    - "swift_object_expirer"
-  when: inventory_hostname in groups['swift-account-server'] or
-        inventory_hostname in groups['swift-container-server'] or
-        inventory_hostname in groups['swift-object-server']
+    - "{{ swift_containers }}"
 
 - import_tasks: start.yml
   vars: