remove a left over comment in marvel_index_template.json and used the proper output settings for grunt

agent/src/main/resources/marvel_index_template.json

@@ -185,7 +185,6 @@
             }
           }
         },
-        //thread_pool.listener.completed
         "thread_pool": {
           "properties": {
             "listener": {

tasks/options/shell.js

@@ -35,9 +35,9 @@ module.exports = function (config) {
       options: {
         stdout: true,
         failOnError: true,
-        maxBuffer: 10 * 1024 * 1024,
         execOptions: {
           cwd: '<%= agentDir %>',
+          maxBuffer: 1024 * 1024 * 1024,
         }
       },
     },