tasks #7044 Adapt to ES 1.2

Change-Id: If1854bb5d8fbc213d628291c3de3cf5b48544dda
Merge commit 'refs/changes/14/2614/3' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7044 Adapt to ES 1.2

Change-Id: I1d0469f8e4c9c5c7f99a449bad065d91aed7eb7e
This is Tuleap 7.1.99.27

Change-Id: Ibd24cf73d7bcb0ec7b965e3fb0845c1e2a7e5ec0