Closes gh-14974

* pr/14967:
  Polish "Consider aliases when checking descendants"
  Consider aliases when checking descendants

See gh-14967

Update `AliasedConfigurationPropertySource` to consider aliases in
`containsDescendantOf`.

Prior to this commit, given a source containing `example.name` with
a defined alias of `other.name -> example.name` calling
`containsDescendantOf("other")` would incorrectly return
`ConfigurationPropertyState.ABSENT`.

Closes gh-14967

* pr/14933:
  Polish "Fix Spring Batch job restart parameters handling"
  Fix Spring Batch job restart parameters handling

See gh-14933

Fix the `JobLauncherCommandLineRunner` to correctly deal with job
parameters when restarting a job.

Prior to this commit, we were was calling the `getNextJobParameters`
method of the `JobParametersBuilder` from batch. This method was getting
the previous parameters of the wrong job instance in a restart scenario.

This commit fixes the issue by first getting the right job instance with
the provided parameters, then restarting it.

Closes gh-14933

Closes gh-14962

Closes gh-14955

Don't use SLF4J loggers in `WebMvcMetricsFilter`.

Fixes gh-14953

Closes gh-14927

* gh-14912:
  Use Errors.hasErrors() in DefaultErrorAttributes

Closes gh-14912

* gh-14916:
  Avoid creation of unnecessary collections

Closes gh-14916

Fix `ResourceUrlEncodingFilter` conditions which were inadvertently
changed in commits 64f04fce and 6cc272ec and would back off if any
`FilterRegistrationBean` was found.

The updated conditions restores the behavior of Spring Boot 2.0.5 and
allows users to directly register their own `ResourceUrlEncodingFilter`
beans (as long as they don't use a `FilterRegistrationBean`).

Fixes gh-14897

This commit also marks a release as pre-release for milestones and RCs

Closes gh-14908
Closes gh-14875

Closes gh-14872

See gh-14893

Previously, when using Tomcat, a call to mappings endpoint would force
the initialization of any DispatcherServlets in the context. This was
done by calling allocate on Tomcat's StandardWrapper. This left the
wrapper in a state that would cause it to block for two seconds during
shutdown as the wrapper has an outstanding allocation.

This commit immediately deallocates the servlet after it has been
allocated. This ensures that the DispatcherServlet has been initialized
while also leaving the wrapper in a state that it can shut down
immediately when asked to do so.

Closes gh-14898

Closes gh-14878

Closes gh-14851

* pr/14836:
  Force JMX hostname to 127.0.0.1

Closes gh-14836

See gh-14857

This commit also restores the `sed` call to sanitize the request body.

Fixes gh-14857

Closes gh-14503