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/sync_file.yml

@@ -1,7 +1,6 @@
 ---
 
 # NOTE: This should be a role (or custom module), but currently include_role is too buggy to use
-
 - name: "sync_file | Set facts for directory and file when sync_file_path is defined"
   set_fact:
     sync_file_dir: "{{ sync_file_path | dirname }}"