A [redis] group with 6 nodes exactly is required for redis cluster mode

Issue

• When installing the Ansible Automation Platform 2.5, facing the following error:

  TASK [ansible.automation_platform_installer.check_config_static : Ensure redis cluster is correctly configured] ***
  fatal: [gateway_node.example.com -> localhost]: FAILED! => {
  "assertion": "groups.get('redis', []) | length == 6",
  "changed": false,
  "evaluated_to": false,
  "msg": "A [redis] group with 6 nodes exactly is required for redis cluster mode"
  }