Add kube anon auth settings to kubeadm config templates (#4713)

* Disable kube_api_anonymous_auth by default to secure the setup

* Disable metrics-server in addons. Health endpoint is slow and unstable

* Fix anonymous-auth missing in configuration

* Cleanup a bit

* Fix kube anon auth

tests/testcases/030_check-network.yml

@@ -90,6 +90,3 @@
     with_nested:
     - "{{ pod_names }}"
     - "{{ pod_ips }}"
-
-  - name: Delete test namespace
-    shell: "{{ bin_dir }}/kubectl delete namespace test"