vtkEventQtSlotConnect.h doesn't support QT_NO_KEYWORDS

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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In order to support QT_NO_KEYWORDS, like QVTKWidget does: http://www.vtk.org/Bug/view.php?id=5544 vtkEventQtSlotConnect.h has to be treated the same way.

The attached patch accomplishes this.