Results 3 issues of libo

Add a configuration variable, we make start time into current system time that the code is running when it is false.

CHN doc: https://timechor.feishu.cn/docx/AugedrYLqoybsbxzgEZc2eTinTg?from=from_copylink

How to use the mode? Edit the config.properties, remove the comment symbols in front of these parameters, and adjust their values, for example: ``` BENCHMARK_WORK_MODE=fixedQueryMode DATA_CLIENT_NUMBER=20 OP_MIN_INTERVAL=30000 FIXED_QUERY_SQL=SELECT data_node_id, client_ip...