message: Correct libindy test for new version of IndyNode.
diff: @@ -1419,7 +1419,7 @@ mod high_cases {
  let response_metadata: serde_json::Value = serde_json::from_str(&response_metadata).unwrap();
  assert!(response_metadata["seqNo"].as_u64().is_some());
  assert!(response_metadata["txnTime"].as_u64().is_none());
  - assert!(response_metadata["lastTxnTime"].as_u64().is_none());
  + assert!(response_metadata["lastTxnTime"].as_u64().is_some());
  assert!(response_metadata["lastSeqNo"].as_u64().is_none());
  }
  