Bump k8s version to v1.7.8-3

Change-Id: I017c6dd20e7a519b30a2861e16d5bad8c692adc3
diff --git a/classes/cluster/k8s-ha-calico-cloudprovider/kubernetes/compute.yml b/classes/cluster/k8s-ha-calico-cloudprovider/kubernetes/compute.yml
index 536dfff..777424a 100644
--- a/classes/cluster/k8s-ha-calico-cloudprovider/kubernetes/compute.yml
+++ b/classes/cluster/k8s-ha-calico-cloudprovider/kubernetes/compute.yml
@@ -10,7 +10,7 @@
     kubernetes_calicoctl_image: docker-prod-virtual.docker.mirantis.net/mirantis/projectcalico/calico/ctl:latest
     kubernetes_calico_image: docker-prod-virtual.docker.mirantis.net/mirantis/projectcalico/calico/node:latest
     kubernetes_calico_cni_image: docker-prod-virtual.docker.mirantis.net/mirantis/projectcalico/calico/cni:latest
-    kubernetes_hyperkube_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/hyperkube-amd64:v1.7.5-2
+    kubernetes_hyperkube_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/hyperkube-amd64:v1.7.8-3
   docker:
     host:
       pkgs: