CBQE-O: print logs if Cluster.shutdown with force

http://qa.hq.northscale.net/job/ubuntu_x64--38_01--cbrecovery-P1/16/consoleFull

Change-Id: I76a6806c097a9fd93745e80d6f238a0821ed02a1
Reviewed-on: http://review.couchbase.org/34770
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>