Support custom Log4J2 log levels by changing `LoggerConfiguration` so
that it can now report levels using a `LevelConfiguration` object
rather than the limited `LogLevel` enum.
The `Log4J2LoggingSystem` class now uses `LevelConfiguration.ofCustom`
for custom logging levels, rather than throwing an exception.
The `LoggersEndpoint` has also been updated so that it can return the
custom logger name.
Fixes gh-35227
When Hazelcast is started on a fixed port and that port is already in
use, it does not fail to start which makes the problem hard to
detect. A symptom of the problem is that clients will not be able to
connect and will either retry indefinitely or will timeout depending
on their configuration.
This commit updates the Hazelcast client tests to start the Hazelcast
instance on an ephemeral port and to customize the client
configuration with the instance's address before use. This should
allow the client tests to work reliably in an environment where
Hazelcast's default port is already in use.
Closes gh-35903
Most notably, this commit splits the tests that use Spring REST Docs
out into a separate task for which predictive test selection is
disabled. This allows it to be cached and use Gradle's built-in
up-to-date checking, thereby avoiding the generation of new snippets
and the need to then run the asciidoctor and asciidoctorPdf tasks.
It also updates spring-boot-smoke-test-junit-vintage to disable
predictive test selection so that we can continue to assert that
the some tests were executed.
See gh-35869
Add `WelcomePageNotAcceptableHandlerMapping` which will return
an HTTP 406 status if a suitable welcome page is found but
cannot be accepted for the request.
An additional mapper is used so that we don't need to change
the order of the `WelcomePageHandlerMapping`. It's possible
that users may have additional root handler mappings
registered to run after the `WelcomePageHandlerMapping`
and we still need to respect those.
Fixes gh-35552
