[PR] Fix ShellBolt log level (storm)

[via GitHub]

mstrucken opened a new pull request, #7955:
URL: https://github.com/apache/storm/pull/7955

   ## What is the purpose of the change
   
   ShellBolt log level is always INFO due to failed check against Long after 
deseralizing
   
   ## How was the change tested
   
   I used the following minimal example:
   
   ```java
   String json = "{\"command\": \"log\", \"msg\": \"Testing ...\", \"level\": 
4}";
   
   try {
       JSONObject msg = (JSONObject) JSONValue.parseWithException(json);
   
       ShellMsg shellMsg = new ShellMsg();
       String command = (String)msg.get("command");
       if (command.equals("log")) {
           Object logLevelObj = msg.get("level");
           if (logLevelObj != null && logLevelObj instanceof Number) {
               int logLevel = ((Number) logLevelObj).intValue();
               shellMsg.setLogLevel(logLevel);
           }
       }
   } catch (ParseException e) {
       throw new RuntimeException(e);
   }
   ```


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