Use legacy docker repository for kubernetes

Change-Id: I163160b437908b7af3bf6226ff4580bafbd7c47a
diff --git a/kubernetes/master/cluster.yml b/kubernetes/master/cluster.yml
index f21f003..4164267 100644
--- a/kubernetes/master/cluster.yml
+++ b/kubernetes/master/cluster.yml
@@ -3,6 +3,7 @@
 - service.keepalived.cluster.single
 - service.haproxy.proxy.single
 - system.haproxy.proxy.listen.kubernetes.apiserver
+- system.linux.system.repo.docker_legacy
 parameters:
   _param:
     kubernetes_netchecker_agent_image: quay.io/l23network/k8s-netchecker-agent:v1.0