request #7113: fix notice on search page when fulltextsearch not installed

Change-Id: I4b980ed98d64346fe9e884611c9cbd5c4f184cb1
Merge commit 'refs/changes/84/2684/1' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #7113: fix notice on search page when fulltextsearch not installed

Change-Id: Iac6795dfd58739759693732a1468864d0f6110d1
This is Tuleap 7.1.99.61

Change-Id: I7d783c92d733d8c4be180c4b506eef3656f5b786