Store unset descriptions etc. as nulls

Dependencies

• [2] PMNWRTGJ Add multiple output support
• [3] 4CELXP7P Remove the longDescription field
• [4] ZTQEU5QS Hydra: Add support for maxSilent meta attribute (also already added timeout, but not implemented the actual timeout for the build yet)
• [5] 3XTHEUMP * Implemented the clone feature.
• [6] RXVJFQ5A Evaluator cleanups
• [7] A22P7HCO hydra: at evaluation, check if path is already built, and mark as built in stead of adding to the queue.
• [8] INNOEHO6 * Fix getBuildLog for bzip2'd files.
• [*] OOQ2D3KC * Refactoring: move fetchInput out of hydra_scheduler into a separate

Change contents

• edit in src/lib/Hydra/Helper/AddBuilds.pm at line 432
  [3.581]

  [2.9004]
  + sub null {

  + my ($s) = @_;

  + return $s eq "" ? undef : $s;

  + }

  +
• replacement in src/lib/Hydra/Helper/AddBuilds.pm at line 440
  [3.473]→[3.5312:5367](∅→∅),[3.724]→[3.5312:5367](∅→∅),[3.1418]→[3.5312:5367](∅→∅),[3.5312]→[3.5312:5367](∅→∅),[3.5430]→[3.5430:5581](∅→∅)
  − , description => $buildInfo->{description}

  − , license => $buildInfo->{license}

  − , homepage => $buildInfo->{homepage}

  − , maintainers => $buildInfo->{maintainers}
  [3.724]

  [3.261]
  + , description => null($buildInfo->{description})

  + , license => null($buildInfo->{license})

  + , homepage => null($buildInfo->{homepage})

  + , maintainers => null($buildInfo->{maintainers})