Removed module names from #include directives.

Getting the #include directives ready for Qt5. This includes the
new-project wizards.

Change-Id: Ia9261f1e8faec06b9285b694d2b7e9a095978d2b
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

tests/auto/extensionsystem/pluginspec/tst_pluginspec.cpp

@@ -35,9 +35,9 @@
 #include <extensionsystem/pluginmanager_p.h>
 #include <extensionsystem/pluginmanager.h>
 
-#include <QtCore/QObject>
-#include <QtCore/QMetaObject>
-#include <QtTest/QtTest>
+#include <QObject>
+#include <QMetaObject>
+#include <QtTest>
 
 using namespace ExtensionSystem;