Bug 156497 [Regression][Acceptance]Report isn't refreshed when delete used library file.
Description: Report isn't refreshed when delete used library file. Steps to reproduce: 1.New a library, add a label, input actuate. 2.New a report, extend lib.label 3.Delete the library file. 4.Refresh the report in Outline of the report Expected result: Empty label in Layout. Actual result: label with content "actuate" in Layout.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/LibraryCommand.java
{
				if ( child.getRoot( ) != module )
					continue;
				if ( actionCode == RELOAD_ACTION )
				{
					Map values = unresolveElementDescendent( module, child );
					overriddenValues.put( new Long( child.getID( ) ), values );
				}
				if ( actionCode == SIMPLE_ACTION )
					throw new LibraryException(
							library,
							new String[]{child.getHandle( module )
									.getDisplayLabel( )},
							LibraryException.DESIGN_EXCEPTION_LIBRARY_HAS_DESCENDENTS );
			} while ( child.hasDerived( ) );
		}
		return overriddenValues;
	}
	/**
	 * Reloads the library with the given file path. After reloading, acticity
	 * stack is cleared.
	 * 
	 * @param location
	 *            the URL file path of the library file.
	 * @throws DesignFileException
	 *             if the file does no exist.
	 * @throws SemanticException
	 *             if the library is not included in the current module.
	 */
	public void reloadLibrary( String location ) throws DesignFileException,