fix(db): fix sonar check

Author: tomatoishealthy

framework/src/main/java/org/tron/program/DBConvert.java

@@ -142,8 +142,8 @@ public static int run(String[] args) {
     // convert v2
     if (cpList != null) {
       cpList.forEach(f -> res.add(esDb.submit(
-          new DBConvert(dbSrc+"/"+CHECKPOINT_V2_DIR_NAME,
-              dbDst+"/"+CHECKPOINT_V2_DIR_NAME, f.getName()))));
+          new DBConvert(dbSrc + "/" + CHECKPOINT_V2_DIR_NAME,
+              dbDst + "/" + CHECKPOINT_V2_DIR_NAME, f.getName()))));
     }
 
     int fails = res.size();