Do not display deleted repositories

This task is part of story #7326 see list of repositories mirrored

Change-Id: I2f6b5db0d5fb7a7645fd05812fa79e9c56e7a1d5
Merge commit 'refs/changes/85/3185/2' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Do not display deleted repositories
This is Tuleap 7.6.99.28

Change-Id: I3b68e3e048945365b7e25555b372a1c134ce2b06