class_docstr: Classifier tests
code: def _mock_conf(cls):
      return {
          "logs": cls._mock_logs(),
          "clusters": {"prod": {"data_sources": cls._mock_sources()}},
          "global": cls._mock_global(),
      }
  
imports: from collections import OrderedDict
  import os
  from mock import Mock, patch
  from nose.tools import assert_equal, assert_raises
  import streamalert.classifier.classifier
  from streamalert.classifier.classifier import Classifier
  from streamalert.shared.exceptions import ConfigError
label_desc: Use image node_id 3 for calling the TestClassifier obj's underlying member method code with example usage: obj._mock_conf(cls) and returns: dict