MB-12594: Pass forestdb info to goxdcr

Change-Id: Ic561721639e1bc658ba2013debc35f0341837e5a
Reviewed-on: http://review.couchbase.org/43011
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>