Bug 155509 ModuleHandle findResource method does not support .properties files
There is no fileType for .properties files in IResourceLocator
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
ArrayList list = new ArrayList( );
		SlotHandle slotHandle = getParameters( );
		Iterator it = slotHandle.iterator( );
		while ( it.hasNext( ) )
		{
			DesignElementHandle h = (DesignElementHandle) it.next( );
			list.add( h );
			if ( h instanceof ParameterGroupHandle )
			{
				addParameters( list, (ParameterGroupHandle) h );
			}
		}
		DesignElementHandle.doSort( list );
		return list;
	}
	/**
	 * Returns an external file that provides help information for the report.
	 * 
	 * @return the name of an external file
	 */
	public String getHelpGuide( )
	{
		return getStringProperty( HELP_GUIDE_PROP );
	}
	/**
	 * Returns the script called when the report starts executing.
	 * 
	 * @return the script called when the report starts executing
	 */
	public String getInitialize( )