Closes gh-6892

@WebAppConfiguration expects a mock web environment. If it is used
in conjuction with @SpringBootTest configured with a RANDOM_PORT or
DEFINED_PORT web environment a null pointer exception occurs as an
assumption that's made by MockServerContainerContextCustomizer doesn't
hold true in a non-mock web environment.

This commit updates SpringBootTestContextBootstrap to detect the
illegal configuration combination and fail fast, advising the user
to remove @WebAppConfiguration or reconfigure @SpringBootTest.

Closes gh-6795

Rename AutoConfigureReportTestExecutionListener to
SpringBootDependencyInjectionTestExecutionListener and ensure that it
replaces any existing DependencyInjectionTestExecutionListener.

Prior to this commit the registration of two DependencyInjection
listeners would cause @PostConstruct methods on tests to be called
twice.

In order to allow the standard DependencyInjectionTestExecutionListener
to be removed a new DefaultTestExecutionListenersPostProcessor interface
has been introduced.

Fixes gh-6874

Closes gh-6827

Update `ConfigFileApplicationListener` so that active profiles set in
properties files that overlap with `spring.profiles.default` can still
be set.

Prior to this commit if `spring.profiles.active` happened to specify
a profile name that was also in `spring.profiles.default` it would
not get applied.

Fixes gh-6833

Tomcat 8.5.5 has change the default value of `validationInterval` to
3000. See https://bz.apache.org/bugzilla/show_bug.cgi?id=59923 for
details.

See gh-6703
See gh-6657

See gh-6870

This reverts commit c54cdd67.

As part of the upgrade, Tomcat now requires a keystore to contain
an X.509 certificate. The two stores used in our tests have been
updated by exporting their private keys and adding them as
certificates. For example:

$ keytool -exportcert -keystore test.jks -alias tomcat > exported
$ keytool -importcert -keystore test.jks -file exported

Closes gh-6703
Closes gh-6657

Closes gh-6795

Closes gh-6870

* pr/6872:
  Polish

Closes gh-6872

Update MockitoAopProxyTargetInterceptor to deal with deal with any
existing argument matchers when working with the VerificationMode.

Prior to this commit `@SpyBean` when combined with AOP could not support
argument matchers.

Fixes gh-6871

Update RootUriRequestExpectationManager to only wrap requests when
they cannot be cast to MockClientHttpRequest. This prevents later
ClassCastExceptions from being thrown with @RestClientTests that
define expected body content.

Fixes gh-6845

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