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
{
		static final int NA = 0;
		static final int PROPERTY_EVENT = 1;
		static final int PROPERTY_LIST_EVENT = 2;
		static final int STYLE_EVENT = 3;
		int action = 0;
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.report.model.core.Listener#notify(org.eclipse.birt.report.model.core.DesignElement,
		 *      org.eclipse.birt.report.model.activity.NotificationEvent)
		 */
		public void elementChanged( DesignElementHandle focus,
				NotificationEvent ev )
		{
			if ( ev.getEventType( ) == NotificationEvent.PROPERTY_EVENT )
			{
				action = PROPERTY_EVENT;
			}
			else if ( ev.getEventType( ) == NotificationEvent.EXTENSION_PROPERTY_DEFINITION_EVENT )
			{
				action = PROPERTY_LIST_EVENT;
			}
			else if ( ev.getEventType( ) == NotificationEvent.STYLE_EVENT )
			{
				action = STYLE_EVENT;
			}
			else
			{
				assert false;