[Doc] Make clear that an error occurred in a pre/post hook.
[Rakefile] Perform setup on for integration only if needed.

This skips the unneeded update.
[Rakefile] Don't set the git user as not needed anymore
[Rakefile] Perform setup on for integration only if needed 2
Merge branch 'master' into dedicated-targets

* master:
  [Rakefile] Perform setup on for integration only if needed 2
  [Rakefile] Don't set the git user as not needed anymore
  [Rakefile] Perform setup on for integration only if needed.
  [Doc] Make clear that an error occurred in a pre/post hook.
[Integration] Update fixtures 2