fix request #5987 - Show correct list of Milestone in the report filter

Change-Id: I63ab3179dbe4003ec44f1795a400242605e8d8e2
Merge commit 'refs/changes/96/1396/3' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  fix request #5987 - Show correct list of Milestone in the report filter

Change-Id: I0a79a1e62a9c317b0a1cbe8eb7ec5d03b0b94095
Tuleap 6.6.99.25

Change-Id: I5887eb67d2030c58ab7b223a433d0839e6f5d4f6