modify default jobname
modify default jobname

bssrdf/rabit,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/rabit,dmlc/rabit,bssrdf/rabit,dmlc/xgboost,dmlc/xgboost,dmlc/rabit,bssrdf/rabit,dmlc/rabit,bssrdf/rabit,bssrdf/rabit