[OpenNebula] tst_qstylesheetstyle fails on Ubuntu 14.04

/home/qt/work/qt/qtbase/tests/auto/widgets/styles/qstylesheetstyle/target_wrapper.sh  ./tst_qstylesheetstyle task232085_spinBoxLineEditBg
********* Start testing of tst_QStyleSheetStyle *********
Config: Using QtTest library 5.6.3, Qt 5.6.3 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 4.8.2)
PASS   : tst_QStyleSheetStyle::initTestCase()
FAIL!  : tst_QStyleSheetStyle::task232085_spinBoxLineEditBg() 'testForColors(image, QColor(0xe8, 0xff, 0x66))' returned FALSE. (QSpinBox did not contain background color #e8ff66, using style QGtkStyle)
   Loc: [tst_qstylesheetstyle.cpp(1652)]
PASS   : tst_QStyleSheetStyle::cleanupTestCase()
Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted
********* Finished testing of tst_QStyleSheetStyle *********
make: *** [check] Error 1