fix: remove circuitbreaker example (#183)

* fix: optimize the discovery inject logic and fix nacos config not working issue

* feat: 删除无用的导入

* feat: 增加actuator到demo中

* fix: add lossless healthcheck for example

* fix: add configuration comments

* fix: 修复事件日志不输出的问题

* release: release version to 1.7.0-RC1

* feat: new add java agent for hoxton

* feat: support service registry and config

* feat: refrator all inject logics into BeanInjector

* feat: add gray release example & dispatch bean register into plugins

* feat: add environment parameter to obtain the configuration

* feat: 增加元数据传输相关拦截器

* feat: 调整example打包脚本

* fix: 修复脚本没法跳转的问题

* fix: 修正样例的配置文件

* fix: 修复熔断无法加载的问题

* fix: 更新北极星的版本号依赖

* fix: 调整版本依赖

* feat：对齐deployment与application中的服务名定义

* feat: optimize default-plugin.conf to load once per lifecyle

* feat: 优化日志打印，增加polarisLoggingApplicationListener的配置

* fix: 修复启动脚本配置项错误问题

* fix: 修复无法javaagent无法获取用户的spring.application.name的问题

* fix: remove circuitbreaker example

Author: andrewshan