story #7393: index artifacts when they are created

Change-Id: Ic1fe902e4a964ad8f7f0e051774d516c55dcba76
Merge commit 'refs/changes/70/3170/4' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  story #7393: index artifacts when they are created
This is Tuleap 7.6.99.26

Change-Id: I9b9e35727e3dcaf1ef08f946d2a6f23869603c2a