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
public void testChoiceDynamicProperty( ) throws Exception
	{
		ExtendedItemHandle itemHandle = insertExtendedItem(
				"matrix1", TESTING_MATRIX_NAME ); 
		
		itemHandle.setProperty( "lineStyle", "thin" ); 
		assertEquals( "thin", itemHandle.getProperty( "lineStyle" ) );
		try
		{
			itemHandle.setProperty( "lineStyle", "wrongChoice" );
			fail( );
		}
		catch ( SemanticException e )
		{
			assertTrue( e instanceof PropertyValueException );
			assertEquals( "thin", itemHandle.getProperty( "lineStyle" ) );
		}
	}
	/**
	 * Tests <code>PropertyInvisible</code> tags in extension plugin.xml.
	 * 
	 * @throws Exception
	 *             if any exception
	 */
	public void testExtensionPropertyInvisible( ) throws Exception
	{
		ExtendedItemHandle itemHandle = insertExtendedItem(
				"matrix1", TESTING_MATRIX_NAME ); 
		ExtendedItem element = (ExtendedItem) itemHandle.getElement( );
		assertFalse( element.getExtDefn( ).isPropertyVisible(