Bug 134954 Library can't be removed
Steps to reproduce: 1.New a report "a.rptdesign" 2.New a library which is not in the same fold with report, saying "../test/lib.rptlibrary" 3.Report includes the library 4.Remove the library Expected result: The library is removed Actual result: Open XMLSource, the included library structure is still there.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/LibraryCommand.java
LevelContentIterator contentIter = new LevelContentIterator( library, 1 );
		while ( contentIter.hasNext( ) )
		{
			DesignElement tmpElement = (DesignElement) contentIter.next( );
			if ( !tmpElement.getDefn( ).canExtend( ) )
				continue;
			Map values = dealElementDecendents( library, tmpElement, actionCode );
			if ( actionCode == RELOAD_ACTION )
				overriddenValues.putAll( values );
		}
		return overriddenValues;
	}
	/**
	 * Performs the action to add the library to the module.
	 * 
	 * @param libraryFileName
	 *            the library path
	 * @param namespace
	 *            the library namespace
	 * @param action
	 *            can be RELOAD or SIMPLE.
	 * @param overriddenValues
	 *            the overridden values.
	 * @throws SemanticException
	 *             if the library file is invalid.
	 */
	private void doAddLibrary( String libraryFileName, String namespace,
			int action, Map overriddenValues ) throws SemanticException,
			DesignFileException
	{