Fixes sla #4085. Converting buffer file data to utf-8 before inserting cross-references.

Change-Id: If6f068c59fc272092b6e06920fb76b228dccf5f3
Merge commit 'refs/changes/68/868/4' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Fixes sla #4085. Converting buffer file data to utf-8 before inserting cross-references.

Change-Id: If0e2fd8df8f1abc119958e73fec282c9db1c1d00
This is Tuleap 6.4.99.5

Change-Id: Ie321f8d208628cffd023cdf4fabf804ce1bc0f4f