Bug 153040 Template definition should be removed after the report item is deleted
Steps to reproduce: 1.New a report, extends lib.label 2.Convert the label to template report item, and revert it back to the report item 3.Delete the label 4.Remove the included library Expected result: Library can be removed Actual result: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:2.1.0.v20060808-0630 Error Code:Error.LibraryException.LIBRARY_HAS_DESCENDENTS Error Message:The library "Lib" can no be dropped because it has descendents "NewLabel" in the current module.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ExtensionModelPropertyDefn.java
while ( iter.hasNext( ) )
		{
			IPropertyDefinition prop = (IPropertyDefinition) iter.next( );
			try
			{
				struct.addProperty( new ExtensionStructPropertyDefn( prop ) );
			}
			catch ( MetaDataException e )
			{
				assert false;
				return null;
			}
		}
		details = struct;
		return struct;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.metadata.PropertyDefn#getTargetElementType()
	 */
	public IElementDefn getTargetElementType( )
	{
		
		
		
		return null;
	}
	/*
	 * (non-Javadoc)