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/src/org/eclipse/birt/report/model/metadata/PeerExtensionLoader.java
choice.setValue( value );
			choice.setDisplayNameKey( displayNameID );
			choice.setDefaultDisplayName( defaultDisplayName );
			return true;
		}
		/**
		 * Loads one visibility rule of a system property definition.
		 * 
		 * @param propTag
		 *            the property tag
		 * @param elementDefn
		 *            element definition
		 * @throws ExtensionException
		 *             if the class some attribute specifies can not be
		 *             instanced.
		 */
		void loadPropertyVisibility( IConfigurationElement propTag,
				ExtensionElementDefn elementDefn ) throws ExtensionException
		{
			
			String name = propTag.getAttribute( NAME_ATTRIB );
			if ( !checkRequiredAttribute( NAME_ATTRIB, name ) )
				return;
			
			String visible = propTag.getAttribute( VISIBILITY_ATTRIB );
			elementDefn.addPropertyVisibility( name, visible );
		}
		/**
		 * Loads the properties of one group.
		 *