qtcanvas3d tests fail during qt5.git integration in '5.10'

There seems to be some problem in qtcanvas3d tests; many tests are failing in '5.10' during qt5.git integration

build log:https://testresults.qt.io/coin/api/results/qt/qtcanvas3d/ea2c167ba86dcf16f77c21bb2b7c76ba2ea3d89e/MacOSMacOS_10_12x86_64MacOSMacOS_10_12x86_64Clangqtci-macos-10.12-x86_64-8-82c315DebugAndRelease_Release/950e67bdda64da75c77e0ad9fdd07730b9f748c7/test_1504419788/testlog.txt.gz

Details: https://testresults.qt.io/coin/integration/qt/qt5/tasks/1504418083

Tested changes (refs/builds/qtci/5.10/1504418077):
https://codereview.qt-project.org/#/q/e38a07f4e133cc5571b6649fc378301f971d3358,n,z Update submodules on '5.10' in qt5