fix kube-proxy server address when local apiserver lb is disabled (#5730)

refs #5277

As the issue describes, when no external or local load-balanced is used,
kube-proxy won't be able to contact apiserver at 127.0.0.1. So the
config map should be left as is.

roles/kubernetes/kubeadm/tasks/main.yml

@@ -116,6 +116,7 @@
     - kubeadm_config_api_fqdn is not defined
     - kubeadm_discovery_address != kube_apiserver_endpoint | replace("https://", "")
     - not kube_proxy_remove
+    - loadbalancer_apiserver_localhost
   tags:
     - kube-proxy