Fix reverse boltdb list and tests

store/bolt.go

@@ -48,7 +48,8 @@ func (bc *BoltClient) List(namespace, key string, asc bool, limit int) ([]string
 				found = append(found, string(k))
 			}
 		} else {
-			for k, _ := c.Seek([]byte(key)); k != nil && len(found) < limit; k, _ = c.Next() {
+			key += "}}}}}}}}}}}}}}}}}}}}}}}}}}}}}"
+			for k, _ := c.Seek([]byte(key)); k != nil && len(found) < limit; k, _ = c.Prev() {
 				found = append(found, string(k))
 			}
 		}