Comment 6 for bug 2002154

This issue comes from nova-cloud-controller which is not updating the value passed in the relation to nova-compute

In this reproduce the units nova-cloud-controller got its virtual ip set after environment ran all the relation hooks, then adding 2 units shows that the new units set the VIP in the relation, but /0 doesn't.

```
$ juju show-unit nova-ironic/0
...
  - relation-id: 32
    endpoint: cloud-compute
    related-endpoint: cloud-compute
    application-data: {}
    related-units:
      nova-cloud-controller/0:
        in-scope: true
        data:
          ...
          serial_console_base_url: ws://10.0.0.127:6083/
      nova-cloud-controller/3:
        in-scope: true
        data:
          ...
          serial_console_base_url: ws://10.0.0.11:6083/
```