'INFO juju.kubernetes.provider using in-cluster config' spammed in logs

[John A Meinel]

On a new 2.9 bootstrap I'm seeing:
```
controller-0: 09:49:46 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:15 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:26 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:29 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:29 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:30 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:30 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:31 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:35 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:38 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:41 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:50:42 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:53:54 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:56:40 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:57:25 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:12 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:38 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:39 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:41 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:42 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:44 INFO juju.kubernetes.provider using in-cluster config
controller-0: 09:59:46 INFO juju.kubernetes.provider using in-cluster config
```

I'm not sure why we're doing that every 2 seconds, but that level of redundancy doesn't feel like it should be at INFO level.