1.修复初始化维度时候，last_exec_time的exec_time为now的bug，初次创建时候应该为null，init之后改为now。

epmet-module/data-statistical/data-statistical-server/src/main/java/com/epmet/service/stats/impl/LastExecRecordServiceImpl.java

@@ -25,9 +25,7 @@ public class LastExecRecordServiceImpl implements LastExecRecordService {
      */
     @Override
     public LastExecRecordEntity createLastExecRecord(String statsSubject) {
-        Date now = new Date();
         LastExecRecordEntity entity = new LastExecRecordEntity();
-        entity.setExecTime(now);
         entity.setSubject(statsSubject);
         entity.setCreatedBy(RobotConstant.DIMENSION_ROBOT);
         entity.setUpdatedBy(RobotConstant.DIMENSION_ROBOT);