Fix for ScriptUtils failure when '--' occurs inside a multi-line comment on the same line as '*/' (#22392)

* Test for multi-line comment block where the comment end delimiter occurs on a line starting with the single-line comment prefix
* ScriptUtils successfully parses a SQL script containing a multi-line comment block where the comment-end delimiter occurs on a line starting with the single-line comment prefix.

* pr/22382:
  Polish contribution
  Polish warning message

Closes gh-22382

See gh-22382

The latter has stale Reactor snapshots

Closes gh-22370

Closes gh-22325

Closes gh-22359

Closes gh-22348

Fixes gh-22364

Closes gh-22331

Closes gh-22346

Closes gh-22344

Add tests for SpringBeanContainer (Hibernate ORM integration) and fix the behavior when requesting named beans (#22260)

* Add integration tests for SpringBeanContainer (Hibernate ORM integration)
* Autowire bean properties of beans retrieved by name in SpringBeanContainer
* Add integration tests for fallback cases in SpringBeanContainer (Hibernate ORM integration)
* Fix SpringBeanContainer incorrectly losing the bean name when calling the fallback producer

(cherry picked from commit 00855c4f)

Includes RxJava 2.2.6, Netty 4.1.33, Undertow 2.0.17.

Fixes gh-22297

Closes gh-22336

Closes gh-22318

Closes gh-22180

* pr/22337:
  Polish "Fix use CompletableFuture in DeferredResultReturnValueHandlerTest"
  Fix use CompletableFuture in DeferredResultReturnValueHandlerTest

* pr/22339:
  Polish "Improve spring-context-indexer documentation"
  Improve spring-context-indexer documentation

Closes gh-22337

See gh-22337

Closes gh-22339

See gh-22339

Fixes gh-22265

Fixes #22307

Fixes #22306

Fix Java 9 build by replacing deprecated method.

Fixes #22303

Issue: #22288

Fixes #22282

Prior to this commit, Spring WebFlux function would let
`DecodingException` thrown by codecs bubble up to the web handler level.
Since this exception is not handled by default there, the response would
be turned into a HTTP 500 status.

In the annotation model, `ArgumentResolver` implementations wrap this
exception with a `ServerWebInputException`, which itself extends
`ResponseStatusException`. The latter is supported by the error handling
infrastructure as a HTTP 400 response.

This commit ensures that `DecodingException` instances are properly
wrapped in `ServerWebInputException` at the `ServerRequest` level
directly, thus supporting all setup modes ("standalone" and through the
`DispatcherHandler`).

Fixes #22290