MB-7168: timeout 90 sec after failover, befor reb

Change-Id: I58a4b01d7c8c1123eb3a905d6588d921ec3cdb83
Reviewed-on: http://review.couchbase.org/24221
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>