Clearing Restler caches in the way described by

http://stackoverflow.com/questions/12304579/luracast-restler-routes-php-cache

Change-Id: I1d4aef773dfe54f12411f58eaf28eb8b48168394
Merge commit 'refs/changes/30/1630/1' of http://gerrit.tuleap.net/tuleap into tuleap-stable-master

* http://gerrit.tuleap.net/tuleap:
  Clearing Restler caches in the way described by

Change-Id: I6aa1734c6632521047a62ff8b59c74f5989ed173
Tuleap 6.8.99.24

Change-Id: Ib4269970d55022a6f0c57a2f17d27e4551dfe5a7