request #7720 Remove fatal error in Boomerang plugin

Change-Id: Ieabb96cfa01b7ae8befe8eb2ca58a4b93b1edc4a
Merge commit 'refs/changes/17/3417/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #7720 Remove fatal error in Boomerang plugin
This is Tuleap 7.8.99.26

Change-Id: I36f984f4c4c1b5b47d7b40ced0400cd5faf64d17