Stubbatti class represents a stub server instance.
function () {
    this.port = DEFAULT_STUBBATTI_PORT;
    this.app = express();
    this.console = global.console;

    var stubbatti = this;

    this.app[KILL_METHOD](KILL_PATH, function (req, res) {
        res.set('Connection', 'close');
        res.end();

        stubbatti.stop();

    });
}