Increase postgresql server max connections to 200

Look like metasploit-framework doesn't close properly pgsql
connections (or maybe I am abusing the msfrpc server.. :)).
This changes increases pgsql max allowed connections to avoid the error
message "FATAL: remaining connection slots are reserved for
non-replication superuser connections' the time to investigate where is
the leak..

Author: Sliim

roles/postgresql-server.json

@@ -29,7 +29,8 @@
             },
             "config": {
                 "ssl": true,
-                "listen_addresses": "0.0.0.0"
+                "listen_addresses": "0.0.0.0",
+                "max_connections": 200
             },
             "pg_hba": [
                 {