CBQE-0: minor fix in failover

Change-Id: I6f12b058c9e1ce1d1aa8a8db1a11624fdbf663b9
Reviewed-on: http://review.couchbase.org/28370
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>