Fix request #3262: Jean Pierre Graph font configuration fails on centos6

Change-Id: I7cf4f43e10e5f827d361e97a5a307ca115348086
Merge commit 'refs/changes/15/1515/1' of http://gerrit.tuleap.net/tuleap into tuleap-stable-master

* http://gerrit.tuleap.net/tuleap:
  Fix request #3262: Jean Pierre Graph font configuration fails on centos6

Change-Id: Ic2f6250de36b139e3a1db0004577622de62fd4f7
Tuleap 6.7.99.18

Change-Id: Ife1b5a5834024144064c85ee24e69758a5f18762