Bug 149783 Display text for extend elelment in master page is not found
Steps to reproduce: 1.New a library, add a properties file for the library, add pair"k1=actuate" to the properties file 2.Add a label "aaa" in master page header, set "k1" as the text key 3.Publish the library 4.New a report, extend lib.masterpage 5.Open extended master page in report Expected result: label shows display text "actuate" Actual result: label shows text "aaa"
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
* <ul>
	 * <li>EXTENSION_ID_PROP for Oda elements.
	 * <li>EXTENSION_NAME_PROP for extension elements like chart.
	 * </ul>
	 * 
	 * @param source
	 *            handle of the source element
	 * @param destination
	 *            handle of the destination element
	 */
	private static void duplicateExtensionIdentifier(
			DesignElementHandle source, DesignElementHandle destination )
	{
		
		
		
		if ( source.getElement( ) instanceof IOdaExtendableElementModel )
		{
			String extensionId = (String) source
					.getProperty( IOdaExtendableElementModel.EXTENSION_ID_PROP );
			destination.getElement( ).setProperty(
					IOdaExtendableElementModel.EXTENSION_ID_PROP, extensionId );
		}
		else
		if ( source.getElement( ) instanceof IExtendedItemModel )
		{
			String extensionId = (String) source
					.getProperty( IExtendedItemModel.EXTENSION_NAME_PROP );
			destination.getElement( ).setProperty(
					IExtendedItemModel.EXTENSION_NAME_PROP, extensionId );