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 creating extension element in the design/library.
	 * 
	 * @throws Exception
	 */
	public void testCreateExtension( ) throws Exception
	{
		SessionHandle session = new DesignEngine( new DesignConfig( ) )
				.newSessionHandle( ULocale.ENGLISH );
		designHandle = session.createDesign( );
		ExtendedItemHandle elementHandle = designHandle.getElementFactory( )
				.newExtendedItem( null, TESTING_MATRIX_NAME );
		assertNotNull( elementHandle.getName( ) );
		libraryHandle = session.createLibrary( );
		elementHandle = libraryHandle.getElementFactory( ).newExtendedItem(
				null, TESTING_MATRIX_NAME );
		assertEquals( "NewTestingMatrix", elementHandle.getName( ) ); 
		PeerExtensionElementDefn extDefn = (PeerExtensionElementDefn) MetaDataDictionary
				.getInstance( ).getExtension( TESTING_MATRIX_NAME );
		IMessages msgs = extDefn.getReportItemFactory( ).getMessages( );
		assertEquals( "TestingMatrix", msgs.getMessage( 
				(String) extDefn.getDisplayNameKey( ), ULocale.ENGLISH ) );
		elementHandle = libraryHandle.getElementFactory( ).newExtendedItem(
				null, TESTING_BOX_NAME );
		assertEquals( "NewTestingBox", elementHandle.getName( ) ); 
		extDefn = (PeerExtensionElementDefn) MetaDataDictionary.getInstance( )
				.getExtension( TESTING_BOX_NAME );
		assertNull( extDefn.getReportItemFactory( ).getMessages( ) );
	}
	class MyListener implements Listener