Updated the syncer test to use merkle_tree_disk.  Seems to work just fine.
Updated the syncer test to use merkle_tree_disk.  Seems to work just fine.

sit/dht,sit/dht,sit/dht,weidezhang/dht,weidezhang/dht,weidezhang/dht,sit/dht,sit/dht,weidezhang/dht,weidezhang/dht