request #6366 - GET /artifacts/:id/changesets should have option to retrieve only comments

Change-Id: I8ea5b0027bfeee74beccded1e9b9df8dc25787d3
Merge commit 'refs/changes/03/2203/4' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #6366 - GET /artifacts/:id/changesets should have option to retrieve only comments
This is Tuleap 6.11.99.39

Change-Id: I1c51c148c29a0ebc3bf78eb7d16b73fc5ba534b8