fix decode NodeID

[huskar-t]

When I use prosys OPC UA Simulation Server as server, I have the same problem as #550, I borrowed from python-opcua and fix the Decode method of NodeID, which seems to solve my problem.

[huskar-t]

@kung-foo @magiconair Please review, I really need this fix

[magiconair]

Sure. Can you please remove the _ = since we don't do that. Can you also look up the relevant part of the spec and add a URL to the code.

[magiconair]

Also, please add some tests. No merge without. Thank you.

[huskar-t]

Sure. Can you please remove the _ = since we don't do that. Can you also look up the relevant part of the spec and add a URL to the code.

I can't find the client protocol specification on the web, can you give me some specifications or websites that you use?

[magiconair]

@huskar-t You should find the NodeID specification somewhere in here: This is a link to the ExpandedNodeId but you should find the TCP/IP binary representation model somewhere in here as well.

https://reference.opcfoundation.org/v104/Core/docs/Part4/7.11/

[huskar-t]

@magiconair Thank you very much, but after reading the code it seems that I made a mistake, I will solve this problem as soon as possible. Maybe close this pr first and create a new one after I solve it

[magiconair]

Sounds good.