tasks #7128: update the elasticsearch database via the system event

Change-Id: Ie97d4102beb96b02f481d1073cdac4a67c377bfe
Merge commit 'refs/changes/07/2707/5' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7128: update the elasticsearch database via the system event
Tuleap 7.2.99.18

Change-Id: Ia531161155a41b2b3f737dbb838f9152621cd374