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/cert_auth_mount.yml

@@ -10,11 +10,10 @@
         max_lease_ttl: "{{ vault_max_lease_ttl }}"
 
 - name: shared/auth_mount | Create a dummy role for issuing certs from auth-pki
-  uri:
-    url: "{{ hostvars[groups.vault|first]['vault_leader_url'] }}/v1/auth-pki/roles/dummy"
-    headers: "{{ hostvars[groups.vault|first]['vault_headers'] }}"
-    method: POST
-    body_format: json
-    body:
-      {'allow_any_name': true}
-    status_code: 204
+  hashivault_approle_role_create:
+    url: "{{ vault_leader_url }}"
+    token: "{{ vault_root_token }}"
+    ca_cert: "{{ vault_cert_dir }}/ca.pem"
+    name: "auth-pki/roles/dummy"
+    policies:
+      allow_any_name: true