feat: add haproxy2 role (#322)

- add basic haproxy2 role
- add peers and resolvers
- add haproxy2+ metrics frontend

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/322

hieradata/nodes/ausyd1nxvm1015.main.unkin.net.yaml

@@ -6,7 +6,7 @@ networking::routes:
   default:
     gateway: 198.18.13.254
 
-profiles::haproxy::dns::vrrp_master: true
+profiles::haproxy::dns::master: true
 keepalived::vrrp_instance:
   VI_250:
     state: 'MASTER'