See gh-6869

This commit improves the JMS health indicator to identify a broken broker
that uses failover. An attempt to start the connection is a good way to
make sure that it is effectively available.

Closes gh-6818

* pr/6651:
  Polish contribution
  Validate Spring Batch database initializer configuration

Closes gh-6651

This commit adds Spring Batch configuration validation that disables
database initializer in case custom table prefix is configured with
default schema.

See gh-6651

* pr/6649:
  Polish contribution
  Validate Spring Session database initializer configuration

Closes gh-6649

This commit adds Spring Session JDBC configuration validation that
disables database initializer in case custom table name is configured
with default schema.

See gh-6649

Update relaxed binding so that names of the form `initSQL` can now
be bound against properties of the form `init-s-q-l`.

Fixes gh-6803

Update our `ResourceHttpRequestHandler` subclass so that the following
warning is no longer displayed:

  "Locations list is empty. No resources will be served unless a
  custom ResourceResolver is configured as an alternative to
  PathResourceResolver."

Fixes gh-6791

* pr/6851:
  Include AuditEvent details in AuditListener

Update `AuthorizationAuditListener` to include `AuditEvent` data if
found.

Closes gh-6851

Update test broken by recent Jetty changes.

See gh-6692

This commit adds a new `spring.thymeleaf.check-template` property which
is only used for Thymeleaf 3.0+.

Since thymeleaf/thymeleaf#419, the Thymeleaf template resolver
implementations can implement the `setCheckExistence` method - this
enables the template existence verification at **resolution** time,
which means the resolver can return null as a `TemplateResolution`
and let other template resolvers in the chain try.

This new property is set to `true` by default and can be disabled if the
application only has a single resolver and the template existence check
is considered as a performance penalty with the configured resolver.

Fixes gh-6500

* pr/6776:
  Add spring.http.multipart.resolve-lazily

This commit adds the `spring.http.multipart.resolve-lazily`
property, in order to configure whether the multipart request
should be resolved lazily, as the parameters are accessed.

When extending `WebMvcConfigurerAdapter`, developers should always
declare those as `@Configuration` classes rather than `@Bean`s, which
can lead to dependency issues as described in #6853.

Fixes gh-6853

* pr/6847:
  Trace endpoint defaults to 100

Closes gh-6847

Update spring-boot-starter-jetty to include an EL dependency.

Fixes gh-6692

* pr/6842:
  Fix ResetMocksTestExecutionListenerTests

Align test implementation with names.

Closes gh-6842

* pr/6836:
  Fix description for max-interval property

Closes gh-6836

* pr/6843:
  Upgrade Spring Session to 1.2.2.RELEASE

Closes gh-6843

Add a `FailureAnalyzer` that handles the case where the context does
not start because no candidate bean was found for an `InjectionPoint`.

The implementation inspects the auto-configuration report for beans
that are candidate and output the condition(s) that lead to such beans
to be discarded on startup. If a whole auto-configuration class is
disabled (or excluded), its beans are inspected and candidates are
extracted in a similar way.

This works for both injection by type and by name.

Closes gh-6612

Add ConditionMessage class to help build condition messages in a
uniform format and update existing conditions to use it.

Fixes gh-6756

This works, and feels like the right thing to do, since there is no
guarantee that extensions won't in turn use ServiceLoader for things
that we haven't yet anticipated.

Fixes gh-6829. Cc @wilkinsona in case he has an opinion.

* pr/6817:
  Polish

Closes gh-6817

* pr/6815:
  Polish `HealthEndpoint` javadoc