CBQE-0: 300000 failover timeout is invalid now

Change-Id: I3cb9087d341c9d5a312755c57a72da7b91aed7bd
Reviewed-on: http://review.couchbase.org/27887
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>