message: Fixed cli ledger test
diff: @@ -1658,7 +1658,6 @@ pub mod tests {
  "protocolVersion":1
  }"#;
  - pub const DID_FOR_SIGN_TXN: &'static str = "E1XWGvsrVp5ZDif2uDdTAM";
  pub const TXN_FOR_SIGN: &'static str = r#"{
  "reqId":1513241300414292814,
  "identifier":"V4SGRU86Z58d6TV7PBUe6f",
  @@ -1801,9 +1800,8 @@ pub mod tests {
  let mut params = CommandParams::new();
  params.insert("sign", "true".to_string());
  params.insert("txn", TXN_FOR_SIGN.to_string());
  - cmd.execute(&ctx, &params).unwrap();
  + cmd.execute(&ctx, &params).unwrap_err();
  }
  - _ensure_nym_added(&ctx, DID_FOR_SIGN_TXN);
  close_and_delete_wallet(&ctx);
  disconnect_and_delete_pool(&ctx);
  }
  