Bug 201368 Support "Not In" operator in filter list
Description: After we support "IN" filter we should also support the "Not In" filter. Data part has already support the "Not In" filter, so hope model can support that operator in the filter operator list. Regards!
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/library/LibraryParseTest.java
LabelHandle labelHandle = (LabelHandle) designHandle
				.findElement( "label" );
		
		LabelHandle labelHandle2 = (LabelHandle) designHandle
				.findElement( "label2" );
		
		LabelHandle labelHandle3 = (LabelHandle) designHandle
				.findElement( "label3" );
		
		LabelHandle labelHandle4 = (LabelHandle) designHandle
				.findElement( "label4" ); 
		
		LibraryHandle libHandle = designHandle
				.getLibrary( "LibParserWithCss_Lib" );
		ThemeHandle themeHandle = libHandle.findTheme( "theme1" );
		List csses = themeHandle.getAllCssStyleSheets( );
		CssStyleSheetHandle sheetHandle = (CssStyleSheetHandle) csses.get( 0 );
		assertFalse( themeHandle.canAddCssStyleSheet( sheetHandle ) );
		assertFalse( themeHandle.canAddCssStyleSheet( "base.css" ) );
		assertFalse( themeHandle.canDropCssStyleSheet( sheetHandle ) );
		
		assertEquals( "center", labelHandle.getStyle( ).getTextAlign( ) );
		
		assertEquals( "right", labelHandle2.getStyle( ).getTextAlign( ) );
		
		assertNull( labelHandle3.getStyle( ).getTextAlign( ) );
		
		assertNull( labelHandle4.getStyle( ).getTextAlign( ) );
		assertTrue( ( (Style) labelHandle3.getStyle( ).getElement( ) )
				.getContainer( ) instanceof Theme );