fd80c55d77
Fixes: #9492
Issue link: https://github.com/spring-projects/spring-integration/issues/9492
Switches `MockIntegrationContextCustomizerFactory` & `SpringIntegrationTestExecutionListener`
to use `TestContextAnnotationUtils` in order to properly support
`@NestedTestConfiguration` semantics.
Adds an integration test with a base class and several
`@Nested` inner test classes to verify the various
permutations of `@SpringIntegrationTest` inherit/override
behavior when used w/ `@NestedTestConfiguration`.
(cherry picked from commit 3a8e3abc7d)