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
* 
		 * @param elementTag
		 *            the element tag
		 * @param propTag
		 *            the property tag
		 * @return the property definition
		 * @throws ExtensionException
		 *             if the class some attribute specifies can not be
		 *             instanced.
		 */
		PredefinedStyle loadStyle( IConfigurationElement elementTag,
				IConfigurationElement propTag, ElementDefn elementDefn )
		{
			
			
			String name = propTag.getAttribute( NAME_ATTRIB );
			String displayNameID = propTag
					.getAttribute( DISPLAY_NAME_ID_ATTRIB );
			PredefinedStyle style = new PredefinedStyle( );
			style.setName( name );
			style.setDisplayNameKey( displayNameID );
			return style;
		}
		/**
		 * Loads one element type name of the given element.
		 * 
		 * @param elementTag
		 *            the element tag
		 * @param elementTypeTag
		 *            the element type tag