The plugin loading mechanism may not be very reasonable

[masteryourself]

Issue Description

bug report

Describe what happened (or what feature you want)

In the HTTP scenario, I want to inject the rest plugin and the okhttp plugin at one time, but the break here causes only one plugin to take effect, and I don't want to load the httpclient4 plugin, but this makes it effective.

private void lazyLoadPlugin(ModelSpec modelSpec, Model model) throws ExperimentException {
        PluginLifecycleListener listener = ManagerFactory.getListenerManager().getPluginLifecycleListener();
        if (listener == null) {
            throw new ExperimentException("can get plugin listener");
        }
        PluginBeans pluginBeans = ManagerFactory.getPluginManager().getPlugins(modelSpec.getTarget());

        if (pluginBeans == null) {
            throw new ExperimentException("can get plugin bean");
        }
        if (pluginBeans.isLoad()) {
            return;
        }
        for (PluginBean pluginBean : pluginBeans.getPluginBeans()) {
            String flag = model.getMatcher().get(pluginBean.getName());
            if ("true".equalsIgnoreCase(flag)) {
                listener.add(pluginBean);
                break;
            }
            listener.add(pluginBean);
        }
        ManagerFactory.getPluginManager().setLoad(pluginBeans, modelSpec.getTarget());
    }

Describe what you expected to happen

How to reproduce it (as minimally and precisely as possible)

1. ./blade create http throwCustomException --exception java.lang.Exception --exception-message='模拟下游调用异常' --uri='https://www.baidu.com' --rest --httpclient4 --process=Demo

Tell us your environment

macos chaosblade-exec-jvm v1.7.2

Anything else we need to know?

I think this might be better

private void lazyLoadPlugin(ModelSpec modelSpec, Model model) throws ExperimentException {
        PluginLifecycleListener listener = ManagerFactory.getListenerManager().getPluginLifecycleListener();
        if (listener == null) {
            throw new ExperimentException("can get plugin listener");
        }
        PluginBeans pluginBeans = ManagerFactory.getPluginManager().getPlugins(modelSpec.getTarget());

        if (pluginBeans == null) {
            throw new ExperimentException("can get plugin bean");
        }
        if (pluginBeans.isLoad()) {
            return;
        }
        // 判断是否有加载条件
        List<PluginBean> candidatePlugin = new ArrayList<PluginBean>();
        for (PluginBean pluginBean : pluginBeans.getPluginBeans()) {
            String flag = model.getMatcher().get(pluginBean.getName());
            if ("true".equalsIgnoreCase(flag)) {
                candidatePlugin.add(pluginBean);
            }
        }
        // 如果没有加载条件, 则全部加载
        if (candidatePlugin.isEmpty()) {
            candidatePlugin.addAll(pluginBeans.getPluginBeans());
        }
        // 依次加载
        for (PluginBean pluginBean : candidatePlugin) {
            listener.add(pluginBean);
            LOGGER.info("plugin [{}] load success", pluginBean.getName());
        }
        ManagerFactory.getPluginManager().setLoad(pluginBeans, modelSpec.getTarget());
    }