MB-9627: Add failover log to stream request response

Change-Id: Ia542e29ca5ea6717fce61cdaf493fa331c7e7ca0
Reviewed-on: http://review.couchbase.org/30489
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>