enables to set keys not present in existing config (#69399)

((cherry picked from commit 95525030e2)

Co-authored-by: satunnainen <satunnainen@users.noreply.github.com>

changelogs/fragments/61067-lxd_container-enables-to-set-keys-not-present-in-existing-config.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - lxd_container - enables to set keys not present in existing config

lib/ansible/modules/cloud/lxd/lxd_container.py

@@ -502,6 +502,8 @@ class LXDContainerManagement(object):
         if key == 'config':
             old_configs = dict((k, v) for k, v in self.old_container_json['metadata'][key].items() if not k.startswith('volatile.'))
             for k, v in self.config['config'].items():
+                if k not in old_configs:
+                    return True
                 if old_configs[k] != v:
                     return True
             return False