refactor vault role (#2733)

* Move front-proxy-client certs back to kube mount

We want the same CA for all k8s certs

* Refactor vault to use a third party module

The module adds idempotency and reduces some of the repetitive
logic in the vault role

Requires ansible-modules-hashivault on ansible node and hvac
on the vault hosts themselves

Add upgrade test scenario
Remove bootstrap-os tags from tasks

* fix upgrade issues

* improve unseal logic

* specify ca and fix etcd check

* Fix initialization check

bump machine size

roles/vault/tasks/shared/auth_backend.yml

@@ -1,20 +1,10 @@
 ---
-- name: shared/auth_backend | Test if the auth backend exists
-  uri:
-    url: "{{ vault_leader_url }}/v1/sys/auth/{{ auth_backend_path }}/tune"
-    headers: "{{ vault_headers }}"
-    validate_certs: false
-  ignore_errors: true
-  register: vault_auth_backend_check
-
-- name: shared/auth_backend | Add the cert auth backend if needed
-  uri:
-    url: "{{ vault_leader_url }}/v1/sys/auth/{{ auth_backend_path }}"
-    headers: "{{ vault_headers }}"
-    method: POST
-    body_format: json
-    body:
-      description: "{{ auth_backend_description|d('') }}"
-      type: "{{ auth_backend_type }}"
-    status_code: 204
-  when: vault_auth_backend_check|failed
+- name: shared/auth_backend | Enable auth backend {{ auth_backend_path }}
+  hashivault_auth_enable:
+    url: "{{ vault_leader_url }}"
+    token: "{{ vault_root_token }}"
+    ca_cert: "{{ vault_cert_dir }}/ca.pem"
+    name: "{{ auth_backend_type }}"
+    mount_point: "{{ auth_backend_path }}"
+    description: "{{ auth_backend_description|d('') }}"
+  register: result