IntegrationEvaluationContextAware.setIntegrationEvaluationContext() invoked after afterPropertiesSet()

Beans implementing `IntegrationEvaluationContextAware` will expect that the `IntegrationEvaluationContext` is set as part of the bean initialization process.

Due to the current approach of setting the context only in `IntegrationEvaluationContextAwareBeanPostProcessor#afterSingletonsInstantiated`, `afterPropertiesSet()` is called before the initialization takes place.

Reconsider the current approach, to reconcile the need for preventing early `BeanFactory` access with the expectations of `InitializingBean`