添加okhttp plugin，启动后崩溃

崩溃报interceptor == null，于是去掉plugin,手动在Okhttp初始化处加入            OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.dns(new HttpDns())
                    .addInterceptor(new OkHttpInterceptor())
                    .retryOnConnectionFailure(true);
报factory already defined