MB-13942: Use same allocator to free memory in GetKV
MB-13942: Use same allocator to free memory in GetKV

Change-Id: Ifefa5750de3cddf1d47e823481166b5ae4eaf220
Reviewed-on: http://review.couchbase.org/48328
Reviewed-by: Marty Schoch <ba9951d7d66412e2a57aea395f01176a793cf5eb@gmail.com>
Reviewed-by: Sriram Melkote <3995a3476470ce2c0c01f75cee639e7d47357a62@couchbase.com>
Tested-by: Sriram Melkote <3995a3476470ce2c0c01f75cee639e7d47357a62@couchbase.com>
Reviewed-by: Traun Leyden <1f7c091e5553824d5a858e410f845ce25844fd2d@couchbase.com>
Tested-by: Traun Leyden <1f7c091e5553824d5a858e410f845ce25844fd2d@couchbase.com>

couchbase/goforestdb,couchbase/goforestdb