邮件标题优化，YYYY-MM-DD-1解析为run_date

Author: xlinliu

dss-appconn/appconns/dss-sendemail-appconn/sendemail-appconn-core/src/main/scala/com/webank/wedatasphere/dss/appconn/sendemail/email/generate/AbstractEmailGenerator.scala

@@ -48,8 +48,8 @@ trait AbstractEmailGenerator extends EmailGenerator with Logging{
     }
     val subject = if (runtimeMap.get("subject") != null) {
       val subjectStr = runtimeMap.get("subject").toString
-        .replaceAll("YYYY-MM-DD-1", "\\${run_date}NO_TIMESTAMP")
-        .replaceAll("YYYY-MM-DD", "\\${run_today}NO_TIMESTAMP")
+        .replaceAll("YYYY-MM-DD-1", "\\${run_date_std}NO_TIMESTAMP")
+        .replaceAll("YYYY-MM-DD", "\\${run_today_std}NO_TIMESTAMP")
       val tmp: util.HashMap[String, Any] = new util.HashMap[String, Any]()
       tmp.put(VariableUtils.RUN_DATE, requestRef.getRunDate)
       VariableUtils.replace(subjectStr, tmp)