Windows: Always compute time remaining in cm_Analyze

Windows: Always compute time remaining in cm_Analyze

In cm_Analyze, the time remaining for processing the request
is used to determine if a retry should requested upon return.
If the request's CM_REQ_NORETRY flag is set, cm_Analyze can
still permit a retry if a new rx connection is to be forced.
This cannot happen if the time remaining is not calculated
when the CM_REQ_NORETRY flag is set.

LICENSE MIT

Reviewed-on: http://gerrit.openafs.org/670
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>