MB-100 Log the same node status that triggered auto-failover.

Change-Id: Ie3cd295afb59ced00848cfe0771e4ef1f3b66053
Reviewed-on: http://review.couchbase.org/29771
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>