summarizer.setConf(conf) should be removed.

[Stefan Groschupf]

Hi,
getExtensionInstance() already set the conf in case it the class  
implements Configurable.
...
  if(object instanceof Configurable) {
            ((Configurable)object).setConf(this.conf);
.. so calling  summarizer.setConf(conf); sets the configuration a  
second time, what is useless.

Should I file a bug?

Stefan