moving attribute on top of the class declaration

Change-Id: I7a5873511b7dde06ad1a7650c8ac052d35e3b605
Merge commit 'refs/changes/57/857/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  moving attribute on top of the class declaration

Change-Id: Icd1e1bebdda1f7e53f46347c9003df99fbe3c75f