Remove leftover

Author: vietj

vertx-db2-client/src/main/java/io/vertx/db2client/impl/codec/InitialHandshakeDB2CommandMessage.java

@@ -113,7 +113,7 @@ void decodePayload(ByteBuf payload, int payloadLength) {
         break;
 
       default:
-        fail(new DB2Exception("The connection was unable to be established. Invalid connection state.", SqlCode.CONNECTION_REFUSED,
+        fireCommandFailure(new DB2Exception("The connection was unable to be established. Invalid connection state.", SqlCode.CONNECTION_REFUSED,
           SQLState.AUTH_DATABASE_CONNECTION_REFUSED));
         break;