[BUG] 熔断后无法恢复

## Issue Description
集群环境，在服务请求出栈时设置熔断器，按异常数熔断，熔断后半开状态正常交易无法通行。
内存出现多个source相同的ExceptionCircuitBreaker

### Describe what happened
并发执行DegradeRuleManager.loadRules(rules)

### Describe what you expected to happen

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

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### Tell us your environment

### Anything else we need to know?