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
}
	/**
	 * Tests the commands: execute, redo , undo and check property.
	 * 
	 * @throws Exception
	 */
	public void testExtendedCommand( ) throws Exception
	{
		openDesign( fileName );
		ExtendedItemHandle extendedHandle = (ExtendedItemHandle) designHandle
				.findElement( "right extended item" ); 
		assertNotNull( extendedHandle );
		
		extendedHandle.loadExtendedElement( );
		
		extendedHandle.setProperty( "company", "new value" ); 
		assertTrue( extendedHandle
				.getStringProperty( "company" ).endsWith( "execute" ) ); 
		ActivityStack stack = design.getActivityStack( );
		stack.undo( );
		assertTrue( extendedHandle
				.getStringProperty( "company" ).endsWith( "undo" ) ); 
		stack.redo( );
		assertTrue( extendedHandle
				.getStringProperty( "company" ).endsWith( "redo" ) ); 
	}
	/**
	 * Tests all the cases about dynamic property list of extended element in
	 * ExtendedItem.
	 *