执行备注优化

README.md

 - 3、任务跨天执行时生成多份日志文件的问题修复；
 - 4、底层日志底层日志调整，非敏感日志level调整为debug；
 - 5、升级数据库连接池c3p0版本；
+- 6、底层代码重构和逻辑优化以及CleanCode；
 
 
 #### 规划中

xxl-job-admin/src/main/java/com/xxl/job/admin/core/callback/XxlJobLogCallbackServerHandler.java

 			}
 		}
 
+		// handle msg
+		StringBuffer handleMsg = new StringBuffer();
+		handleMsg.append("执行备注：").append(requestModel.getMsg());
+		if (childTriggerMsg !=null) {
+			handleMsg.append("<br>子任务触发备注：").append(childTriggerMsg);
+		}
+
 		// success, save log
 		log.setHandleTime(new Date());
 		log.setHandleStatus(requestModel.getStatus());
-		log.setHandleMsg(requestModel.getMsg() + childTriggerMsg);
+		log.setHandleMsg(handleMsg.toString());
 		DynamicSchedulerUtil.xxlJobLogDao.updateHandleInfo(log);
 
 		return new ResponseModel(ResponseModel.SUCCESS, null);