new failing qmluitests with Unity 8 on Qt 5.7.1

As continuation of bug #1642919 , there are new failures with Unity 8 on Qt 5.7.1, found via autopkgtesting of a final Qt 5.7.1 release PPA.

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FAIL! : qmltestrunner::ApplicationWindow::test_appCrashed() property state
   Actual (): void
   Expected (): screenshot
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_ApplicationWindow.qml(353)]
FAIL! : qmltestrunner::ApplicationWindow::test_killedAppShowsScreenshot() property state
   Actual (): surface
   Expected (): screenshot
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_ApplicationWindow.qml(303)]
FAIL! : qmltestrunner::ApplicationWindow::test_restartApp() property state
   Actual (): surface
   Expected (): screenshot
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_ApplicationWindow.qml(321)]
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FAIL! : qmltestrunner::PhoneStage::test_closeZombieSurface() property count
   Actual (): 1
   Expected (): 0
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_PhoneStage.qml(549)]
FAIL! : qmltestrunner::PhoneStage::test_closeZombieSurface() function returned unexpected result
   Actual (): 1
   Expected (): 0
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/obj-x86_64-linux-gnu/tests/utils/modules/Unity/Test/UnityTestCase.qml(649)]
FAIL! : qmltestrunner::PhoneStage::test_dashRemainsRunningIfStageIsToldSo() property count
   Actual (): 2
   Expected (): 1
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_PhoneStage.qml(95)]
FAIL! : qmltestrunner::PhoneStage::test_selectSuspendedAppWithoutSurface() property state
   Actual (): 1
   Expected (): 2
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_PhoneStage.qml(497)]
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FAIL! : qmltestrunner::TabletStage::test_selectSuspendedAppWithoutSurface() property count
   Actual (): 1
   Expected (): 0
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_TabletStage.qml(655)]
FAIL! : qmltestrunner::TabletStage::test_selectSuspendedAppWithoutSurface() function returned unexpected result
   Actual (): 1
   Expected (): 0
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/obj-x86_64-linux-gnu/tests/utils/modules/Unity/Test/UnityTestCase.qml(649)]
FAIL! : qmltestrunner::TabletStage::test_suspendsAndResumesAppsInMainStage() property count
   Actual (): 3
   Expected (): 1
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_TabletStage.qml(138)]
FAIL! : qmltestrunner::TabletStage::test_suspendsAndResumesAppsInMainStage() 'verify()' returned FALSE. ()
   Loc: [/tmp/autopkgtest.XPKycX/build.7en/unity8-8.15+17.04.20161215/tests/qmltests/Stage/tst_TabletStage.qml(180)]
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Logs, all with same failures:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-zesty-ci-train-ppa-service-1985/zesty/amd64/u/unity8/20170106_100308_7ead7@/log.gz
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-zesty-ci-train-ppa-service-1985/zesty/i386/u/unity8/20170106_052919_7ead7@/log.gz

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-zesty-ci-train-ppa-service-1985/zesty/amd64/u/unity8/20170108_054528_bff31@/log.gz
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-zesty-ci-train-ppa-service-1985/zesty/i386/u/unity8/20170107_205328_bff31@/log.gz