Add original nova policy as comments

Author: JohnGarbutt

etc/kayobe/kolla/config/nova/policy.yml

@@ -1,2 +1,4 @@
+#"os_compute_api:servers:create:forced_host": "rule:context_is_admin"
 "os_compute_api:servers:create:forced_host": "rule:context_is_admin or role:baremetaluser"
+#"compute:servers:create:requested_destination": "rule:context_is_admin"
 "compute:servers:create:requested_destination": "rule:context_is_admin or role:baremetaluser"