updated repo paths for released hector stacks in tu-darmstadt-ros-pkg

Those released stacks are also contained in tu-darmstadt-ros-pkg.rosinstall. Do we need to have them twice in doc/fuerte? I was not aware of the additional files until I found them a couple of minutes ago.

The doc jobs for these jobs on Jenkins fail since 10 days ago as we deleted the old branch from the SVN.