Kubernetes Dashboard v1.7.1 Refactor

This version required changing the previous access model for dashboard completely but it's a change for the better. Docs were updated.

* New login/auth options that use apiserver auth proxying by default
* Requires RBAC in `authorization_modes`
* Only serves over https
* No longer available at https://first_master:6443/ui until apiserver is updated with the https proxy URL:
* Can access from https://first_master:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/login you will be prompted for credentials
* Or you can run 'kubectl proxy' from your local machine to access dashboard in your browser from: http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/
* It is recommended to access dashboard from behind a gateway that enforces an authentication token, details and other access options here: https://github.com/kubernetes/dashboard/wiki/Accessing-Dashboard---1.7.X-and-above

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

@@ -1,10 +1,20 @@
 ---
+- name: Kubernetes Apps | Delete old kubernetes-dashboard resources
+  kube:
+    name: "kubernetes-dashboard"
+    kubectl: "{{bin_dir}}/kubectl"
+    resource: "{{ item }}"
+    state: absent
+  with_items: ['ClusterRoleBinding']
+  tags:
+    - upgrade
+
 - name: Kubernetes Apps | Lay down dashboard template
   template:
     src: "{{item.file}}"
     dest: "{{kube_config_dir}}/{{item.file}}"
   with_items:
-    - {file: dashboard.yml.j2, type: deploy, name: netchecker-agent}
+    - {file: dashboard.yml.j2, type: deploy, name: kubernetes-dashboard}
   register: manifests
   when: inventory_hostname == groups['kube-master'][0]