REST Tests now properly support plugins

Change-Id: Id0faf8701ce162875abde123a2fd392b405f6388
Merge commit 'refs/changes/25/2825/2' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  REST Tests now properly support plugins

Change-Id: I9fb31b49d97685506e120721289c79cf52ea8697
Merge branch 'master' of tuleap.net:tuleap/tuleap/stable into tuleap-stable-master