JIRA: https://jira.spring.io/browse/INT-4513
The `IntegrationManagementConfigurer` keeps metrics beans in its local
stores.
When we add beans at runtime, they are not removed from those caches
after their removal
* Implement `DestructionAwareBeanPostProcessor` in the `IntegrationManagementConfigurer`
and clean up caches according provided bean type and its name
* Improve `ManualFlowTests` and `FtpTests` to be sure that
`IntegrationManagementConfigurer` caches are cleared after destroying
`IntegrationFlowRegistration`
**Cherry-pick to 5.0.x**
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