CBQE-1408: py-autofailover.conf without windows group

Change-Id: I8f6d8ca00f77fc7e236594718eef0af76426f79c
Reviewed-on: http://review.couchbase.org/28016
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>