CBQE-1695: fix load_with_failover

Change-Id: I6239b0c74e10c83ff9d9da75b9ad512e5402c48b
Reviewed-on: http://review.couchbase.org/30341
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>