* Revert for now due to Postgres breakage.

Dependencies

• [2] AHTEIK7G * Added a maintainers field to the Builds table.
• [3] QZLMDKMU * Queue runner: don't start scheduled builds builds if they belong to
• [4] NREF6YOA * Don't start more builds concurrently than allowed for each system
• [5] 7YBYT2LQ

Change contents

• replacement in src/script/hydra_queue_runner.pl at line 64
  [3.490]→[2.17893:17989](∅→∅)
  − { join => ['schedulingInfo', 'project'], group_by => 'system', as => ['system'] });
  [3.490]

  [3.8604]
  + { join => ['schedulingInfo', 'project'], select => [{distinct => 'system'}], as => ['system'] });