JIRA: https://jira.spring.io/browse/INT-3765
The `beanFactory.getBeanNamesForType(Class<?> aClass)`
has eager `FactoryBean` loading logic and using it from the `BeanPostProcessor`
may cause an issue with late-binding beans like auto-created `MessageChannel`.
The change that code to the
```
beanFactory.getBeanNamesForType(IntegrationMBeanExporter.class, false, false)
```
to bypass `FactoryBean`s eager initialization.
All other similar usage throughout the project are OK, because they are already outside of any `BPP`
**Cherry-pick to 4.1.x and 4.0.x**
cd582926e1