attribute time_zone should work with element schedule

Current Situation

• As stated in the article What time zone support is available in JobScheduler? the time_zone attribute is availabe for the element <schedule>.
• Currently, this attribute used in the <schedule> element has no effect.

Desired Behavior

• The time_zone attribute should be recognized by JobScheduler as it works in <run_time> element.

Further Explanations

• This works:

  <?xml version="1.0" encoding="ISO-8859-1"?>
  <order>
      <run_time time_zone="Europe/London" schedule="europe_gtf_startup"/>                  
  </order>
  

  <schedule>
      <weekdays >
          <day  day="0">
              <period  single_start="19:00:00"/>
          </day>
      </weekdays>
  </schedule>
  

• This does not work:

  <order>
      <run_time schedule="europe_gtf_startup"/>
  </order>
  

  <schedule  time_zone="Europe/London" > 
      <weekdays >
          <day  day="0">
              <period  single_start="19:00:00"/>
          </day>
      </weekdays>
  </schedule>
  

Maintainer Notes

• The documentation is wrong. An attribute <schedule time_zone="..."/> is not supported. The documentation has been fixed to reflect the effective behavior.
• There are use cases for an attribute <schedule time_zone="..."/>, e.g. not to have to specify the attribute for each job that makes use of the same schedule.
• Currently we estimate no immediate need to implement such behavior as the functionality is available by specifying <run_time schedule="..." time_zone="...".
• The respective functionality for adding time zones with the <run_time> element in JOE is covered by JOE-155