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 ( !StringUtil.isBlank( defaultValue ) )
			{
				try
				{
					Object value = extPropDefn.validateXml( null, defaultValue );
					extPropDefn.setDefault( value );
				}
				catch ( PropertyValueException e )
				{
					handleError( new ExtensionException(
							new String[]{name, elementDefn.getName( )},
							MetaDataException.DESIGN_EXCEPTION_INVALID_DEFAULT_VALUE ) );
					return null;
				}
			}
			return extPropDefn;
		}
		/**
		 * Loads one choice.
		 * 
		 * @param choiceTag
		 *            the choice tag
		 * @param choice
		 *            the extension choice set load
		 * @param propDefn
		 *            the property definition in which the choices are inserted
		 * @throws ExtensionException
		 *             if the class some attribute specifies can not be
		 *             instanced.
		 */