request #6486: Fix invalid param issue on advanced query for date field

Change-Id: Ic6a807c426ae0b9c701b2ede4f566c28c20cb125
Merge commit 'refs/changes/24/2124/4' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #6486: Fix invalid param issue on advanced query for date field

Change-Id: I5768291bf8e4d829f4f49c9a6ca9f6a8a79ec424
Tuleap 6.11.99.32

Change-Id: I87dc5ed534f1f668ca25277f6f25b4ad0f7dd2d4