JPAWorkList need to get current date from database

[jinyoung]

Old implementation gets the current date from database not from the back end server. That means, some insert queries may be companied with native SQLs with current date, it may causes inconsistency with the date obtained by back-end and database server. But for new implementation will not use the native SQLs as possible, it may be ok. If it is problematic again, we need to implement this again:

Potential problematic implementations can be found at JPAWorkList or JPAProcessInstance

 Calendar dueDate = null;
            try{
                String dueDateInMSStr = ""+parameterMap.get(KeyedParameter.DUEDATE);
                long dueDateInMS = Long.parseLong(dueDateInMSStr);
                dueDate = Calendar.getInstance();
                dueDate.setTimeInMillis(dueDateInMS);
            }catch(Exception e){
            }

Old implementations obtains the date from the database like this SQL:

  select SYSDATE from dual