[alibaba/arthas]ArthasAgent能否把ArthasBootstrap对象放出来，能够主动调用destroy

现在bootstrap没发通过ArthasAgent拿到,所以只能重写ArthasAgent整个类

  /**
   * <pre>
   * ArthasBootstrap bootstrap = ArthasBootstrap.getInstance(inst);
   * </pre>
   */
  Class<?> bootstrapClass = arthasClassLoader.loadClass(ARTHAS_BOOTSTRAP);
  Object bootstrap = bootstrapClass.getMethod(GET_INSTANCE, Instrumentation.class, Map.class).invoke(null,
          instrumentation, configMap);