public boolean isStepDownWhenVoteTimedout() {
        return this.stepDownWhenVoteTimedout;
    }
Check whether start up old storage (RocksdbLogStorage) when use newLogStorage
This option needs to be set to true if logs still exists in RocksdbLogStorage
jraft-core/src/main/java/com/alipay/sofa/jraft/option/RaftOptions.java