Bug 197261 [2.2.1]The report that contain library xtab and set filter cannot be run
Description: [2.2.1]The report that contain library xtab and set filter cannot be run Step: 1.New a library and add a xtab 2.New a report and use the library 3.Drop the xtab from library explorer into layout 4.Set the filter on the xtab that is in report 5.Preview Actual result: It pop up an error said that the report cannot be run
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
*            the tag of the write
	 * @param propName
	 *            the property name
	 * @param cdata
	 *            whether the value should be written as CDATA.
	 */
	protected void writeProperty( DesignElement obj, String tag,
			String propName, boolean cdata )
	{
		PropertyDefn propDefn = obj.getPropertyDefn( propName );
		
		if ( propDefn == null )
			return;
		Object value = obj.getLocalProperty( getModule( ), propName );
		if ( value == null )
			return;
		String xml = propDefn.getXmlValue( getModule( ), value );
		if ( xml == null )
			return;
		if ( propDefn.isEncryptable( ) )
		{
			IEncryptionHelper helper = MetaDataDictionary.getInstance( )
					.getEncryptionHelper( );
			xml = helper.encrypt( xml );
		}
		if ( tag == null )
			tag = ModelUtil.getTagByPropertyType( propDefn );
		if ( propDefn.getTypeCode( ) == IPropertyType.SCRIPT_TYPE )
			cdata = true;
		writeEntry( tag, propDefn.getName( ), xml, cdata );