Remove namespace from tracker xml templates
Remove perms on refs/changes/*

Following the discussion on tuleap-devel[1] it appears that we shouldn't
create rules for "refs/changes/*".

[1] https://tuleap.net/plugins/forumml/message.php?group_id=101&topic=20064&list=1

Change-Id: I5ef23d90a08669f1b15a7e32b4c305613b9ce9cd
Merge commit 'refs/changes/08/408/1' of http://gerrit.tuleap.net/tuleap into tuleap-stable-master

* http://gerrit.tuleap.net/tuleap:
  Remove namespace from tracker xml templates
Tuleap 5.12.99.55
Merge branch 'master' of tuleap.net:tuleap/tuleap/stable into tuleap-stable-master
Merge commit 'refs/changes/09/409/2' of http://gerrit.tuleap.net/tuleap into tuleap-stable-master

* http://gerrit.tuleap.net/tuleap:
  Remove perms on refs/changes/*
Tuleap 5.12.99.56