SlackNotification: Use bigger images

Dependencies

• [2] KUORZDSR Add slack plugin.

Change contents

• replacement in src/lib/Hydra/Plugin/SlackNotification.pm at line 51
  [2.1816]→[2.1816:2117](∅→∅)
  − $build->buildstatus == 0 ? "$imgBase/static/images/checkmark_16.png" :

  − $build->buildstatus == 2 ? "$imgBase/static/images/dependency_16.png" :

  − $build->buildstatus == 4 ? "$imgBase/static/images/cancelled_16.png" :

  − "$imgBase/static/images/error_16.png";
  [2.1816]

  [2.2117]
  + $build->buildstatus == 0 ? "$imgBase/static/images/checkmark_256.png" :

  + $build->buildstatus == 2 ? "$imgBase/static/images/dependency_256.png" :

  + $build->buildstatus == 4 ? "$imgBase/static/images/cancelled_128.png" :

  + "$imgBase/static/images/error_256.png";