code: def list_rules(self, service=None):
          
          rules = {}
          for service in self.app.get_services():
              rules[service] = {}
              for instance in self.app.get_service_instances(service):
                  rules[service][instance] = {}
                  resp = requests.get("http://{}/gremlin/v1/rules/list".format(instance))
                  if resp.status_code != 200:
                      print 'Failed to fetch rules from %s - instance %s' % (service, instance)
                      continue
                  rules[service][instance] = resp.json()
                  return rules
docs: List fault fault injection rules installed on instances of a given service (or all services)
              returns a JSON dictionary