Allow failover log in stream request response

Change-Id: Id8844d1190ac883e0f472215b1c1c61eef8203fc
Reviewed-on: http://review.couchbase.org/30488
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>