@Override
    public int hashCode() {
        int result = id;
        result = 31 * result + (databaseName != null ? databaseName.hashCode() : 0);
        result = 31 * result + activeConnectionAvg;
        result = 31 * result + maxConnectionAvg;
        return result;
    }
@author Taejin Koo
@author Jongjin.Bae
batch/src/main/java/com/navercorp/pinpoint/batch/alarm/vo/DataSourceAlarmVO.java