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
methodInfo.addArgumentList( argumentList );
			return addDefnTo( elementDefn, methodInfo );
		}
		/**
		 * Loads one property definition of the given element.
		 * 
		 * @param elementTag
		 *            the element tag
		 * @param propTag
		 *            the property tag
		 * @param elementDefn
		 *            element definition
		 * @return the property definition
		 */
		ArgumentInfo loadArgument( IConfigurationElement elementTag,
				IConfigurationElement propTag, ExtensionElementDefn elementDefn )
		{
			String name = propTag.getAttribute( NAME_ATTRIB );
			String tagID = propTag.getAttribute( TAG_ID_ATTRIB );
			String type = propTag.getAttribute( TYPE_ATTRIB );
			if ( name == null )
				return null;
			ArgumentInfo argument = new ArgumentInfo( );
			argument.setName( name );
			argument.setType( type );
			argument.setDisplayNameKey( tagID );
			return argument;
		}
		/**
		 * Loads one property definition of the given element.