* GH-8642: Revise executors in the project
Fixes https://github.com/spring-projects/spring-integration/issues/8642
* Rework some `Executors.newSingleThreadExecutor()` to `ExecutorServiceAdapter(new SimpleAsyncTaskExecutor())`
* Expose `TaskExecutor` setters; deprecate `ExecutorService`-based
* Some other code clean up in the effected classes: `LogAccessor`, no `synchronized` in critical blocks
* Give a meaningful prefix for default threads in the context of components, e.g. `SubscribableRedisChannel` - `getBeanName() + "-"`
* * Fix `PostgresChannelMessageTableSubscriberTests` for
`PostgresSubscribableChannel` initialization to let it create
its internal `Executor`
* Use an `AsyncTaskExecutor` injection instead of `ExecutorServiceAdapter` wrapping
* Fix `LockRegistryLeaderInitiatorTests` for `taskExecutor` injection
* Bring back `LockRegistryLeaderInitiator.setExecutorService()`
as an accident after property auto-renaming
Fixes https://github.com/spring-projects/spring-integration/issues/3686
* Add `src/idea` with respective editor config for IntelliJ IDEA.
Must be imported into an IDE
* Add `src/eclipse` with respective editor config for Eclipse/STS
* Reformat imports in source code according a new editor config
* Some code style improvement for SMB classes
* Make an `SmbSessionTests` based on the `SmbTestSupport` for faster execution, but not blocking on fake URL connection attempt
* Remove `AbstractMqttMessageDrivenChannelAdapter.Topic` model in favor of `LinkedHashMap` handling
* Update javadocs
* Upgrade from log4j to log4j2
* Remove unnecessary test deps.
* Change from implmementation to api
* Remove unneeded test deps.
* Fix HZ XSD to be "versionless"
* Use `com.google.code.findbugs:annotations` dep to avoid warning from HZ code base
