private void clearCircuitBreakerFactory() {
		Optional.ofNullable(getConfigurations(circuitBreakerFactory))
				.ifPresent(Map::clear);
	}
properties backup, prevent rules from being updated every time the container is
refreshed.
spring-cloud-alibaba-starters/spring-cloud-circuitbreaker-sentinel/src/main/java/com/alibaba/cloud/circuitbreaker/sentinel/feign/CircuitBreakerRuleChangeListener.java