TraceReactorAutoConfiguration.HooksRefresher improper queue decoration

[kkondratov]

Describe the bug
TraceReactorConfiguration configures Hooks for reactor based on the spring.sleuth.reactor.instrumentation-type property.

However on RefreshScopeRefreshedEvent the HooksRefresher bean decorates reactor with both DECORATE_QUEUES and DECORATE_ON_EACH when the spring.sleuth.reactor.instrumentation-type is set to DECORATE_QUEUES.
The switch statement is missing a break when the DECORATE_QUEUES is done.

See:

spring-cloud-sleuth/spring-cloud-sleuth-autoconfigure/src/main/java/org/springframework/cloud/sleuth/autoconfig/instrument/reactor/TraceReactorAutoConfiguration.java

Line 142 in 4446b76

case DECORATE_QUEUES:

This causes Applications that have DECORATE_QUEUES set and get a RefreshScopeRefreshedEvent to spike in cpu usage due hooks added from both DECORATE_QUEUES and DECORATE_QUEUES.