Define downstream pause image for k8s

Change-Id: I4e870acb1a85960d8c37a26efc5027bc7d10cab3
diff --git a/classes/cluster/sl-k8s-contrail/kubernetes/compute.yml b/classes/cluster/sl-k8s-contrail/kubernetes/compute.yml
index c64be9f..03890c1 100644
--- a/classes/cluster/sl-k8s-contrail/kubernetes/compute.yml
+++ b/classes/cluster/sl-k8s-contrail/kubernetes/compute.yml
@@ -37,3 +37,4 @@
     common:
       hyperkube:
         image: ${_param:kubernetes_hyperkube_image}
+        pause_image: ${_param:kubernetes_pause_image}