Bug 210496 Add hasStyle property in reportItemModel extension point
When chart gets reportItem's properties by extending ReportItem, style properties are null. Hence, model needs to add hasStyle property in reportItemModel extension point
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/extension/ReportItemExtensionTest.java
assertEquals( "\"X\"", ( (MapRule) mapRules.get( 0 ) ).getValue1( ) ); 
		assertEquals( DesignChoiceConstants.MAP_OPERATOR_TRUE,
				( (MapRule) mapRules.get( 1 ) ).getOperator( ) );
		assertEquals( "Open", ( (MapRule) mapRules.get( 1 ) ).getDisplay( ) ); 
		assertEquals( DesignChoiceConstants.MAP_OPERATOR_LIKE,
				( (MapRule) mapRules.get( 2 ) ).getOperator( ) );
		assertEquals( "Unknown", ( (MapRule) mapRules.get( 2 ) ).getDisplay( ) ); 
		NameSpace ns = design.getNameHelper( ).getNameSpace(
				Module.STYLE_NAME_SPACE );
		assertEquals( 4, ns.getCount( ) );
		
		StyleElement predefinedStyle = design.findStyle( "extended-item" ); 
		assertEquals( "extended-item", predefinedStyle.getName( ) ); 
		assertEquals(
				"normal", predefinedStyle.getStringProperty( design, Style.FONT_VARIANT_PROP ) ); 
		StyleHandle sh = extendedHandle.getPrivateStyle( );
		Iterator iter = sh.mapRulesIterator( );
		assertNotNull( iter.next( ) );
		assertNotNull( iter.next( ) );
		assertNotNull( iter.next( ) );
		ArrayList list = new ArrayList( );
		list.add( extendedHandle );
		GroupElementHandle groupHandle = new SimpleGroupElementHandle(
				designHandle, list );
		assertEquals(
				"center", groupHandle.getStringProperty( Style.BACKGROUND_POSITION_X_PROP ) ); 
		extendedHandle = (ExtendedItemHandle) designHandle
				.findElement( "predefined style item" ); 
		assertNotNull( extendedHandle );