d_hscan does not work when compression strategy is set to something other than NONE

[avinokurov]

seems like d_hscan has a bug when using CompressionValueOperation ScanResult gets a stale cursor and therefore does not scan all the records. It should get a cursor from the result of the client.hscan(key, cursor).getResult() execution. The result of this is that not all records are returned when compression strategy is set to THRESHOLD