Fix Phpunit tests on proftpd

Change-Id: I12375075018d76ef623d47dbfc902e6a4592e7e1
Merge commit 'refs/changes/58/2058/3' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Fix Phpunit tests on proftpd

Change-Id: Ia153a76545dd3e425b952a2f3cc7a79974580ce7
This is Tuleap 6.11.99.4

Change-Id: I8a0d73dca282d4416c0f485e92533d478069fe41