8150490: Update OS detection code to recognize Windows Server 2016

Reviewed-by: mgronlun, alanb, dholmes

src/os/windows/vm/os_windows.cpp

 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1747,8 +1747,7 @@ void os::win32::print_windows_version(outputStream* st) {
     if (is_workstation) {
       st->print("10");
     } else {
-      // The server version name of Windows 10 is not known at this time
-      st->print("%d.%d", major_version, minor_version);
+      st->print("Server 2016");
     }
     break;