CBQE-0: print output for enable/disable firewall on windows

Change-Id: I9bbe2f4986fcfdae68915def97e5db362ba1b473
Reviewed-on: http://review.couchbase.org/34897
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>