Moved qobjectrace into integrationtests/

The qobjectrace test seems to belong to
integrationtests/ since it tests the interaction
between QObject and QThread (much in the same way
integrationtests/qsharedpointer_and_qwidget/ tests the
interaction between QSharedPointer and QWidget).

Change-Id: I89f1dab7300c2ef23755d52a86479677ef021ef1
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>

tests/auto/corelib.pro

@@ -1,5 +1,4 @@
 TEMPLATE=subdirs
 SUBDIRS=\
    corelib \
-   qobjectrace \
    utf8

tests/auto/integrationtests/integrationtests.pro

@@ -17,6 +17,7 @@ SUBDIRS=\
    qfocusevent \
    qmultiscreen \
    qnetworkaccessmanager_and_qprogressdialog \
+   qobjectrace \
    qsharedpointer_and_qwidget \
    windowsmobile \