Fix nodes for virtlet addon in k8s_ha_calico.

Fixed nodes hosts provided for virtlet addon in
k8s_ha_calico model.

Change-Id: I1d8455c8c1a7359887e826c7a0fd6670d5027214
diff --git a/classes/cluster/k8s-ha-calico/kubernetes/compute.yml b/classes/cluster/k8s-ha-calico/kubernetes/compute.yml
index be8ae98..2681e7f 100644
--- a/classes/cluster/k8s-ha-calico/kubernetes/compute.yml
+++ b/classes/cluster/k8s-ha-calico/kubernetes/compute.yml
@@ -33,7 +33,7 @@
           namespace: ${_param:kubernetes_addon_namespace}
           image: ${_param:kubernetes_virtlet_image}
           hosts:
-          - ${linux:system:name}
+          - ${_param:kubernetes_compute01_hostname}
       hyperkube:
         image: ${_param:kubernetes_hyperkube_image}
   linux: