Follow-up to task #6605: Report duplication issues

Change-Id: I5ddcd135a9c61adeef63f4bf2bc672374956c0e1
Merge commit 'refs/changes/85/2285/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Follow-up to task #6605: Report duplication issues
This is Tuleap 6.12.99.43

Change-Id: I22b1e85c44e0655f4440553efcd09316752d69b0