Fix initial documentation setup

Properly create item in default admin projec (1) instead of relying
on some magic for item order creation.

Change-Id: I6ab45627b09036842373d18023013e5fa30206be
Merge commit 'refs/changes/71/671/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Fix initial documentation setup

Change-Id: I4e3abd0208d9c26b62847455a7842dff69cce670
This is Tuleap 6.2.99.42

Change-Id: I32fb02d5453dc5b6ba68384882947bfd600a4a51