[Patch] Allow specifiying the guid for NTDS Settings

[Matthieu Patou]

Hello andrew,
> I would also prefer this was not exposed to the command line - indeed, I
> would prefer less provision command line options in total (for example,
> provide invocationID only as a parameter to provision(), but not a
> command line parameter to ./provision
>    
Here is a similar patch that don't expose this option to the command line.

Let me know.

Matthieu