startDataBase

function startDataBase(callback){
    MongoClient.connect('mongodb://' + dbConfig.user + ':' + dbConfig.pass + '@' + dbConfig.host + ':' + dbConfig.port + '/' + dbConfig.dataBaseName, function(err, db) {
        if(err) callback(err, null);
        console.log(dbConfig.host);

        var collection = db.collection("info-bus");
        console.log(collection);
        collection.remove({}, function(){});
        callback(null, collection);
    });
}