UI: VM's on crashed node show as running

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

~~~
UI
~~~

##### CLOUDSTACK VERSION

~~~
4.18.1.0
~~~

##### CONFIGURATION

N/A

##### OS / ENVIRONMENT

N/A

##### SUMMARY

When a kvm node crashes (no maintenance) the VM's running on that node will still show the status "Running" in the dashboard.
When accessing the VM itself you get the error message:
`The Control Plane Status of this instance is Offline. Some actions on this instance will fail, if so please wait a while and retry.`
When the kvm node restarts, after some time the VM's on it will show as "Stopped" and will have to be started manually.

##### STEPS TO REPRODUCE

~~~
Force reboot without maintenance a kvm node that run's compute resources
~~~

##### EXPECTED RESULTS

~~~
I would expect the VM's to show as Stopped/Crashed as soon as the kvm node goes down
~~~

##### ACTUAL RESULTS

~~~
VM looks as running:
~~~

~~~
VM details says there is an issue with control plane:
~~~

~~~
Node is offline:
~~~

Empieza en las vistas del dashboard y de detalles de VM, reproduciendo el problema al reiniciar por la fuerza un nodo KVM sin mantenimiento. Sigue cómo se refleja el estado offline del plano de control en el estado de la VM; se considera terminado cuando las VM afectadas muestran rápidamente Stopped o Crashed y siguen siendo coherentes después de que se reinicie el nodo.

Escrito por el modelo de indexación a partir del texto del issue.