AutoTest: Use normal object for settings

Ownership is clear here.

However, since this is accessed via the static plugin interface,
this needed some change that access.

Change-Id: I9488a242442303dee89006240f787677afab730a
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/autotest/testsettingspage.cpp

@@ -140,7 +140,7 @@ void TestSettingsWidget::onFrameworkItemChanged()
     m_ui.frameworksWarn->setVisible(true);
 }
 
-TestSettingsPage::TestSettingsPage(const QSharedPointer<TestSettings> &settings)
+TestSettingsPage::TestSettingsPage(TestSettings *settings)
     : m_settings(settings)
 {
     setId("A.AutoTest.0.General");