docker_swarm: fix ca_force_rotate idempotency (#53039)

* Fix ca_force_rotate idempotency.

* Add changelog.

changelogs/fragments/53039-docker_swarm-ca_force_rotate.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- "docker_swarm - fixes idempotency for the ``ca_force_rotate`` option."

lib/ansible/modules/cloud/docker/docker_swarm.py

@@ -297,6 +297,8 @@ class TaskParameters(DockerBaseClass):
         ca_config = spec.get('CAConfig') or dict()
         if self.node_cert_expiry is None:
             self.node_cert_expiry = ca_config.get('NodeCertExpiry')
+        if self.ca_force_rotate is None:
+            self.ca_force_rotate = ca_config.get('ForceRotate')
 
         dispatcher = spec.get('Dispatcher') or dict()
         if self.dispatcher_heartbeat_period is None: