@Override
    public Boolean getBooleanProperty(final String key, final Boolean defaultValue) {
        return Boolean.valueOf(getProperty(key, Boolean.toString(defaultValue)));
    }
set file name.
@param fileName fileName
shenyu-sync-data-center/shenyu-sync-data-polaris/src/test/java/org/apache/shenyu/sync/data/polaris/handler/PolarisMockConfigFile.java