Story #6009: API REST is no longer called directly in presenter for burndown

Change-Id: Ia4f56ee9d05a3a6c2341970feb4d8ce9a227f705
Merge commit 'refs/changes/37/1937/5' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Story #6009: API REST is no longer called directly in presenter for burndown

Change-Id: I53918ad53bfe247c646655e95c853c963f77292d
This is Tuleap 6.10.99.32

Change-Id: Icb4045d65ed6263cf0d0b4536e7d0db5e35e8e5c