feat: add haproxy profile

- add haproxy server class
- add haproxy profile to role
- add hiera data for region specific haproxy
- add selinux configuration
- add certlist management
- add default http and https frontends
- add default stats listener

site/profiles/manifests/haproxy/mappings.pp

@@ -0,0 +1,9 @@
+# profiles::haproxy::mappings
+class profiles::haproxy::mappings (
+  Array $list = []
+) {
+  haproxy::mapfile { 'domains-to-backends':
+    ensure   => 'present',
+    mappings => $list,
+  }
+}