CBIDXT-117: Tool to get raw upr stream.

Change-Id: Ic359afa6dc1922bd91e3ed43670b9eb884a04f4d
Reviewed-on: http://review.couchbase.org/39871
Reviewed-by: Pratap Chakravarthy <prataprc@couchbase.com>
Tested-by: Pratap Chakravarthy <prataprc@couchbase.com>