Add support for running a nodelocal dns cache (#3861)

* Add support for running a nodelocal dns cache

After encountering dns issues in a cluster I was recently working on I
noticed Kubernetes 1.13 introduced support for running a nodelocal dns
cache.

I believe this can usefull for more people.

73b548db06
https://github.com/kubernetes/enhancements/blob/master/keps/sig-network/0030-nodelocal-dns-cache.md

* Add requested changes

* Add additional requested changes + documentation

* Add requested changes after review

* Replace incorrect variable

roles/kubernetes-apps/ansible/tasks/nodelocaldns.yml

@@ -0,0 +1,18 @@
+---
+- name: Kubernetes Apps | Lay Down nodelocaldns Template
+  template:
+    src: "{{ item.file }}.j2"
+    dest: "{{ kube_config_dir }}/{{ item.file }}"
+  with_items:
+    - { name: nodelocaldns, file: nodelocaldns-config.yml, type: configmap }
+    - { name: nodelocaldns, file: nodelocaldns-sa.yml, type: sa }
+    - { name: nodelocaldns, file: nodelocaldns-deamonset.yml, type: daemonset }
+  register: nodelocaldns_manifests
+  vars:
+    clusterIP: "{{ skydns_server }}"
+    secondaryclusterIP: "{{ skydns_server_secondary }}"
+  when:
+    - enable_nodelocaldns == True
+    - inventory_hostname == groups['kube-master'] | first
+  tags:
+    - nodelocaldns