message: use correct pool name so it gets deleted after test
diff: @@ -1932,6 +1932,7 @@ mod high_cases {
  let constraints = response.result["data"].as_object().unwrap();
  assert!(constraints.len() > 0);
  + utils::tear_down_delete_wallet(&wallet_config);
  utils::tear_down_with_wallet_and_pool(wallet_handle, pool_handle, "indy_get_auth_rule_request_works_for_getting_all", &wallet_config);
  }
  @@ -1950,7 +1951,7 @@ mod high_cases {
  let response = ledger::submit_request(pool_handle, &get_auth_rule_request).unwrap();
  pool::check_response_type(&response, ResponseType::REQNACK);
  - utils::tear_down_with_wallet_and_pool(wallet_handle, pool_handle, "indy_get_auth_rule_request_works_for_getting_all", &wallet_config);
  + utils::tear_down_with_wallet_and_pool(wallet_handle, pool_handle, "indy_get_auth_rule_request_works_for_no_constraint", &wallet_config);
  }
  }
  }
  