Mail should not include event xml files

Current Situation

• JS-1473 introduced the event xml files to be attached to mails that are send by JobScheduler.
• The respective setting in the stylesheet ./config/scheduler_mail.xsl is:

  <mail attach_xml="yes">
  

Desired Behavior

• No xml files are included with mail being sent.
• Adding xml files a restriced to debugging purposes.

Workaround

• Modify ./config/scheduler_mail.xsl to specify

  <mail attach_xml="no">
  

• A JobScheduler restart is required after the modification.