Bad `tfw_logger` error message

[krizhanovsky]

# cat xfw_logger.json 
        {
            "log_path": "/var/log/tempesta-escudo/tfw_logger.log",
            "xfw_events": {
                "plugin_path": "/root/ao/escudo_install/lib/incident_log.so",
                "port": 9000,
                "user": "default",
                "password": "",
                "db_name": "default",
                "table_name": "incident_log",
                "max_events": 1000,
                "max_wait_ms": 100
            }
        }

With no local ClickHouse running produce bad (unclear) error messages in the log:

Failed to connect to ClickHouse: fail to connect: Connection refused

1. "fail to connect" duplicates "Failed to connect to ClickHouse"
2. need to add IP address and port, which attempt to connect to