usp10: fix tests to allow atomic patches for new implementation

[Clinton Stimpson]

Hi,

Here's a patch to make unimplemented functions return E_NOTIMPL instead 
of S_OK.  Even dependent functions already return E_NOTIMPL.  Also 
fixing tests to check that the return value is S_OK before testing the 
'out' parameters.
This fix allows piecemeal patches to follow with implementation for each 
  function in a separate patch.

Thanks,
Clinton Stimpson

ChangeLog
     Return E_NOTIMPL where appropriate.
     And only check out parameters when appropriate.

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