[TECHNICAL SUPPORT] LPS-42106 recurrence in workflow xml accepts second as scale but event will not run

There will be aanother commit for kaleo-web-plugins which will depend on this fix.

I was thinking about deleting this
```
     if (_frequency == CronText.NO_FREQUENCY) {
        dayOfWeek = StringPool.QUESTION;
      }
```
and changing dayOfWeek initialization to StringPool.QUESTION;. But that was not similar to other initialization.