Windows: NP Fail requests if AFSGetAuthenticationId fails

If during the processing of a network provider request the Logon
Session AuthenticationId is zero and the AFSGetAuthenticationId()
function is unable to obtain the current thread's AuthenticationId,
then fail the request.

Change-Id: If2aeba836d762f4f1b982d954fac720863a05c1f
Reviewed-on: http://gerrit.openafs.org/10900
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>