Fix sla #4627 - Issue to download files with size greater than 200mb under php53.

Change-Id: I2cc9f098178a1463f77439192cd14ce62a91676a
Merge commit 'refs/changes/87/687/2' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix sla #4627 - Issue to download files with size greater than 200mb under php53.

Change-Id: Ib00be956037acc4f924f548be4e90d2fd170f7a0
Tuleap 6.3.99.3

Change-Id: I4a396a610cc3e327c1a71f8ca448d32dcbd91c89