Quiet the phpab output

Change-Id: I570463c7d1a7ff032f32e38dd3bbd07b55822c39
Merge commit 'refs/changes/30/1530/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Quiet the phpab output

Change-Id: Ie05e423b4c03d10b8bd9bee00a2c3d3abf259ef9
This is Tuleap 6.7.99.22

Change-Id: Ia0011497d928fa0321d2d84c8428b454cd7ecd57