code: def mock_conf():
      return {
          "global": {
              "general": {
                  "rule_locations": [],
                  "matcher_locations": [],
              },
              "infrastructure": {"rule_staging": {"enabled": True}},
          }
      }
  
imports: from datetime import datetime, timedelta
  from mock import Mock, patch, PropertyMock
  from nose.tools import assert_equal, assert_false, assert_true
  from publishers.community.generic import remove_internal_fields
  from streamalert.shared.publisher import AlertPublisher, Register, DefaultPublisher
  import streamalert.rules_engine.rules_engine
  from streamalert.rules_engine.rules_engine import RulesEngine
label_desc: Use image node_id 1 for calling a global function with example usage: mock_conf() and returns: dict