Bump Kubernetes version to 1.8.4-3

Change-Id: Iedffb58cdf733d359f05277e65549507162a91cf
diff --git a/classes/cluster/k8s-ha-calico/kubernetes/init.yml b/classes/cluster/k8s-ha-calico/kubernetes/init.yml
index 1336dde..e9fd44c 100644
--- a/classes/cluster/k8s-ha-calico/kubernetes/init.yml
+++ b/classes/cluster/k8s-ha-calico/kubernetes/init.yml
@@ -26,7 +26,7 @@
     kubernetes_calico_cni_image: docker-prod-virtual.docker.mirantis.net/mirantis/projectcalico/calico/cni:latest
     kubernetes_calico_policy_image: calico/kube-policy-controller:v0.5.4
 
-    kubernetes_hyperkube_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/hyperkube-amd64:v1.7.8-3
+    kubernetes_hyperkube_image: docker-prod-virtual.docker.mirantis.net/mirantis/kubernetes/hyperkube-amd64:v1.8.4-3
     kubernetes_virtlet_image: mirantis/virtlet:latest
     kubernetes_dashboard_image: gcr.io/google_containers/kubernetes-dashboard-amd64:v1.5.1
     kubernetes_kubedns_image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.5