JOC Cockpit API and GUI should manage larger log output

Current Situation

• Jobs can write log output of arbitrary size to the job's stdout/stderr channel. The JS7 Agent and Controller handle log output based on a streaming implementation that can handle this size.
• The JOC Cockpit History Service manages larger log output within the scope of JOC-1358.
• The JOC Cockpit GUI offers logs for both
  • direct display of log output in the browser (log view window),
  • download of the log output via browser..

Desired Behavior

• The JOC Cockpit API will consider the size of uncompressed log output: A threshold setting determines if the API will instruct the GUI to 
  • offer log output for both display with a browser and download of log output if the size of such output will not exceed the threshold
  • offer download of log output only if the size of such output will exceed the threshold.
• The JOC Cockpit GUI will handle display of the order log like this:
  • Any included task logs are retrieved individually from the API.
  • Task logs are retrieved on demand if the user clicks on the arrow icon to display the task log.
• The threshold value can be modified from the JOC Cockpit Settings page with the log_maximum_display_size (default: 10 MB) setting.