MB-100: print nodes statused if they are incorrect

failover tests

Change-Id: I08b9eea82e715ec98d629e9bc50eb7ecb09aac4f
Reviewed-on: http://review.couchbase.org/24948
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>