Bump k8s version up to v1.11.5

Change-Id: I77f46ac03cfd3f1e86db6e3327b37c27d8f0edab

magnum/drivers/k8s_fedora_atomic_v1/templates/kubecluster.yaml

@@ -326,7 +326,7 @@ parameters:
   kube_tag:
     type: string
     description: tag of the k8s containers used to provision the kubernetes cluster
-    default: v1.11.1
+    default: v1.11.5-1
 
   # FIXME update cloud_provider_tag when a fix for PVC is released
   # https://github.com/kubernetes/cloud-provider-openstack/pull/405
@@ -355,7 +355,7 @@ parameters:
   kube_version:
     type: string
     description: version of kubernetes used for kubernetes cluster
-    default: v1.11.1
+    default: v1.11.5
 
   kube_dashboard_version:
     type: string