support git branches as input in stead of only master branch

Dependencies

• [2] BK24VA6Q * for git inputs, check latest revision of branch (defaults to master for now), if there is change, only use input if last checkout was > hour ago.
• [3] OOQ2D3KC * Refactoring: move fetchInput out of hydra_scheduler into a separate
• [4] JTRG7RDQ add support for git as jobinput

Change contents

• replacement in src/lib/Hydra/Helper/AddBuilds.pm at line 221
  [3.432]→[3.432:454](∅→∅)
  − my $uri = $value;
  [3.432]

  [3.454]
  + (my $uri, my $branch) = split ' ', $value;

  + $branch = defined $branch ? $branch : "master";

  +
• edit in src/lib/Hydra/Helper/AddBuilds.pm at line 228
  [2.1]→[2.1:30](∅→∅)
  − my $branch = "master";

  −