classifier = TopicClassificationEngine.fromParameters(getDefaultClassifierConfigParams());
//configure the directory used to create Embedded SolrServers for CVFold
classifier.configureEmbeddedSolrServerDir(solrHome);
trainingSetSolrServer = makeEmbeddedSolrServer(solrHome, "trainingsetserver",
"test-topic-trainingset", "default-topic-trainingset");
trainingSet = new SolrTrainingSet();
trainingSet.configure(getDefaultTrainingSetConfigParams());
}