Fixes https://github.com/spring-projects/spring-integration/issues/3840
* Create a new abstraction `RedisTest` for Testcontainers-based tests
* Move existing common utility methods to the new interface
* Migrate all existing Redis tests to use this new `RedisTest` interface
* Migrate all existing Redis tests to JUnit5
* Make all existing Redis tests confirming to JUnit5 standards, such as
default methods and classes visibility instead of public
* Add a dependency for parametrized tests in JUnit5
* Improve assertions readability across tests, for instance:
assertThat(thing.size()).isEqualTo(2) -> assertThat(thing).hasSize(2)
* Add real assertions to
`RedisLockRegistryTests.twoRedisLockRegistryTest` (earlier it did not
have assertions at all)
* Reformat, rearrange and cleanup the code
* Fix a couple of small changes after the code review:
* Change base interface name to be consistent with other similar places
* Typo in javadocs
* Small tests readability improvement regarding assertions
* Add `opens java.util` to `spring-integration-redis`
to satisfy a `ReactiveRedisStreamMessageHandlerTests.testMessageWithListPayload()`
requirements
1c461a3e2c