Hydra/31: "Duration" field broken in cached builds that are not in DB anymore

Dependencies

• [2] ZI535LI6 * hydra: 'new' UI for project/jobset/job/build
• [3] 45ESKY6T * hydra: show finish time on build status overview
• [4] 2R7GHSA4 * hydra: added initial version of build graph
• [5] ELABMHJI * hydra: layout changes
• [*] J5UVLXOK * Start of a basic Catalyst web interface.

Change contents

• replacement in src/root/build.tt at line 132
  [2.5222]→[2.5222:5302](∅→∅)
  − (cached from [% INCLUDE renderFullBuildLink build=cachedBuild %])
  [2.5222]

  [2.5302]
  + (cached[% IF cachedBuild %] from [% INCLUDE renderFullBuildLink build=cachedBuild %][% END %])