Qt5.6: UbuntuListView unit test fails with TypeError

[Tim Peeters]

Failing unit tests with Qt 5.6:

********* Start testing of components *********
Config: Using QtTest library 5.6.1, Qt 5.6.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 5.4.0 20160609)
PASS : components::UbuntuListView::initTestCase()
PASS : components::UbuntuListView::test_collapseByClickingOutside()
PASS : components::UbuntuListView::test_collapseOnClick()
PASS : components::UbuntuListView::test_destroyAndRecreateExpanded()
PASS : components::UbuntuListView::test_dimOthers()
PASS : components::UbuntuListView::test_expandedItem()
FAIL! : components::UbuntuListView::test_noScrollingNeeded() Uncaught exception: Type error
   Loc: [/tmp/buildd/ubuntu-ui-toolkit-1.3.2085+16.10.20160831.4/tests/unit/visual/tst_ubuntulistview.10.qml(116)]
FAIL! : components::UbuntuListView::test_scrollIntoView() Uncaught exception: Type error
   Loc: [/tmp/buildd/ubuntu-ui-toolkit-1.3.2085+16.10.20160831.4/tests/unit/visual/tst_ubuntulistview.10.qml(142)]
FAIL! : components::UbuntuListView::test_scrollToTop() Uncaught exception: Type error
   Loc: [/tmp/buildd/ubuntu-ui-toolkit-1.3.2085+16.10.20160831.4/tests/unit/visual/tst_ubuntulistview.10.qml(129)]
PASS : components::UbuntuListView::cleanupTestCase()
Totals: 7 passed, 3 failed, 0 skipped, 0 blacklisted
********* Finished testing of components *********

See https://jenkins.ubuntu.com/ubuntu-sdk/job/ubuntu-ui-toolkit-ci-amd64-devel/1201/consoleFull

[Andrea Bernabei (faenil)]

We were previously misusing mapToItem by not passing x/y parameters
and relying on JS to initialize them to 0.

Qt5.6 fixes QTBUG-41686 and requires x/y to be explicitly passed.