MB-7863: wait 2 minutes that node status changed after failover

Change-Id: If38aa24be047f266cd1076fd3b53349eb13f97e5
Reviewed-on: http://review.couchbase.org/26022
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>