What to do for the d3d11:d3d11 crash on cw-gtx560?

[Francois Gouget]

> From bug https://bugs.winehq.org//show_bug.cgi?id=51103

The commit adding more SwapDeviceContextState() tests (ccffc06c6df3) is 
causing d3d11:d3d11 to crash on the GTX 560 Nvidia card:

https://test.winehq.org/data/patterns.html#d3d11:d3d11

It turns out that the crash is happening in the final 
ID3D11Device1_Release(device) call in test_device_context_state().

So that's probably a reference counting bug in the Nvidia driver but it 
still happens on the latest driver for that GeForce GTX 560 card : 
391.35.

So what should we do?
Drop the final ID3D11Device1_Release(device) call?
Drop the extra tests?
Something else?