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/cluster/create_roles.yml

@@ -6,5 +6,5 @@
     create_role_password: "{{ item.password }}"
     create_role_policy_rules: "{{ item.policy_rules }}"
     create_role_options: "{{ item.role_options }}"
-    create_role_mount_path: "{{ mount.name }}"
+    create_role_mount_path: "/{{ mount.name }}"
   with_items: "{{ mount.roles }}"