tasks #6830 - hide tracker for users during migration

Change-Id: Ie18bc174e8417b064427786de00594d5c4ba1055
Merge commit 'refs/changes/84/2484/2' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #6830 - hide tracker for users during migration

Change-Id: I173a6cfd626071d4f1fc84848f6c35845a9b808b
This is Tuleap 7.0.99.36

Change-Id: Ie7719ff84abbad571902e85a1c42b07822a03939