CBIDXT-10 Catchup Stream and Recovery

Change-Id: Ic839d31ab932dde6c8747603bbc75bb196d17ca0
Reviewed-on: http://review.couchbase.org/41987
Reviewed-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>
Tested-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>