Qt 5.0 beta requires changing the default to the 5.0 API, disabling
the deprecated code. However, tests should test (and often do) the
compatibility API too, so turn it back on.

Task-number: QTBUG-25053
Change-Id: I6988c2360e9d88916311374a0c910bfc5b607439
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>