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/kubernetes/preinstall/tasks/set_facts.yml

@@ -13,6 +13,5 @@
 
 - import_tasks: set_resolv_facts.yml
   tags:
-    - bootstrap-os
     - resolvconf
     - facts