[autotest] QAbstractTextDocumentLayout::imageAt() fails on OpenSUSE 42.1

******** Start testing of tst_QAbstractTextDocumentLayout *********
Config: Using QtTest library 5.8.0, Qt 5.8.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 4.8.5)
PASS   : tst_QAbstractTextDocumentLayout::initTestCase()
FAIL!  : tst_QAbstractTextDocumentLayout::imageAt() Compared values are not the same
   Actual   (documentLayout->imageAt(fooPoint)): "image"
   Expected (QString())                        : ""
   Loc: [tst_qabstracttextdocumentlayout.cpp(198)]
PASS   : tst_QAbstractTextDocumentLayout::cleanupTestCase()
Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted, 195ms
********* Finished testing of tst_QAbstractTextDocumentLayout *********
Makefile:273: recipe for target 'check' failed
make: *** [check] Error 1