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
*             if error encountered when adding the element to metadata
		 *             dictionary.
		 * @throws ExtensionException
		 *             if the class some attribute specifies can not be
		 *             instanced.
		 */
		void loadElement( IConfigurationElement elementTag )
		{
			
			String extensionName = elementTag
					.getAttribute( EXTENSION_NAME_ATTRIB );
			String className = elementTag.getAttribute( CLASS_ATTRIB );
			if ( !checkRequiredAttribute( EXTENSION_NAME_ATTRIB, extensionName )
					|| !checkRequiredAttribute( CLASS_ATTRIB, className ) )
				return;
			
			String displayNameID = elementTag
					.getAttribute( DISPLAY_NAME_ID_ATTRIB );
			String defaultStyle = elementTag
					.getAttribute( DEFAULT_STYLE_ATTRIB );
			boolean isNameRequired = getBooleanAttrib( elementTag,
					IS_NAME_REQUIRED_ATTRIB, false );
			String extendsFrom = elementTag.getAttribute( EXTENDS_FROM_ATTRIB );
			if ( StringUtil.isBlank( extendsFrom ) )
				extendsFrom = ReportDesignConstants.EXTENDED_ITEM;
			IReportItemFactory factory = null;
			PeerExtensionElementDefn elementDefn = null;
			try
			{
				factory = (IReportItemFactory) elementTag