- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 2.7.4.1
* Java version: 1.8

### Actual Result

[https://github.com/apache/dubbo/blob/839d2a604e629ea9e96b964be09ae221e85312ba/dubbo-common/src/main/java/org/apache/dubbo/rpc/model/ApplicationModel.java#L80](https://github.com/apache/dubbo/blob/839d2a604e629ea9e96b964be09ae221e85312ba/dubbo-common/src/main/java/org/apache/dubbo/rpc/model/ApplicationModel.java#L80)

### Expected Result

```
initFrameworkExts
```
ExtensionLoader<ApplicationInitListener> extensionLoader = ExtensionLoader.getExtensionLoader(ApplicationInitListener.class);
            Set<String> listenerNames = extensionLoader.getSupportedExtensions();
            for (String listenerName : listenerNames) {
                extensionLoader.getExtension(listenerName).init();
            }
        }
    }
    public static Collection<ConsumerModel> allConsumerModels() {
        return getServiceRepository().getReferredServices();
    }
    public static Collection<ProviderModel> allProviderModels() {
        return getServiceRepository().getExportedServices();
    }
    public static ProviderModel getProviderModel(String serviceKey) {
        return getServiceRepository().lookupExportedService(serviceKey);
    }
    public static ConsumerModel getConsumerModel(String serviceKey) {
        return getServiceRepository().lookupReferredService(serviceKey);
    }
    private static final ExtensionLoader<FrameworkExt> loader = ExtensionLoader.getExtensionLoader(FrameworkExt.class);
    public static void iniFrameworkExts() {
        Set<FrameworkExt> exts = ExtensionLoader.getExtensionLoader(FrameworkExt.class).getSupportedExtensionInstances();
        for (FrameworkExt ext : exts) {
            ext.initialize();
        }
    }
    public static Environment getEnvironment() {
        return (Environment) loader.getExtension(Environment.NAME);
    }
    public static ConfigManager getConfigManager() {