* remove REPLACE_ENFORCE_GLOG compile option & add ci rule prohibit LOG(FATAL) using, test=develop

* remove ci test case, test=develop

* replace all LOG(FATAL) & polish message, test=develop

* fix typo, test=develop

* polish error info detail, test=develop

* user can call dataset.set_download_cmd to set its customized download cmd
* add UT to cover this scenario

* add collective communication library in fleet to replace mpi
* test=develop

test=develop

test=develop