message: fixed tests after merge
diff: @@ -1320,11 +1320,10 @@ mod demos {
  TestUtils::cleanup_storage();
  let pool_name = "pool1";
  - let prover_wallet_name = "prover_wallet";
  let xtype = "default";
  //1. Create Prover wallet, get wallet handle
  - let prover_wallet_handle = WalletUtils::create_and_open_wallet(pool_name, prover_wallet_name, xtype).unwrap();
  + let prover_wallet_handle = WalletUtils::create_and_open_wallet(pool_name, Some(xtype)).unwrap();
  let schema_seq_no = 1;
  let schema = AnoncredsUtils::get_gvt_schema_json(schema_seq_no);
  @@ -1456,15 +1455,13 @@ mod demos {
  TestUtils::cleanup_storage();
  let pool_name = "pool1";
  - let issuer_wallet_name = "issuer_wallet";
  - let prover_wallet_name = "prover_wallet";
  let xtype = "default";
  //1. Create Issuer wallet, get wallet handle
  - let issuer_wallet_handle = WalletUtils::create_and_open_wallet(pool_name, issuer_wallet_name, xtype).unwrap();
  + let issuer_wallet_handle = WalletUtils::create_and_open_wallet(pool_name, Some(xtype)).unwrap();
  //2. Create Prover wallet, get wallet handle
  - let prover_wallet_handle = WalletUtils::create_and_open_wallet(pool_name, prover_wallet_name, xtype).unwrap();
  + let prover_wallet_handle = WalletUtils::create_and_open_wallet(pool_name, Some(xtype)).unwrap();
  //3. Issuer create claim definition
  let schema_seq_no = 1;
  