Closes gh-5816

Create ErrorPageRegistry and ErrorPageRegistrar interfaces that allow
error page registration to be a first class concern.

Prior to this commit ErrorPageFilter needed to implement
ConfigurableEmbeddedServletContainer in order to receive ErrorPage
registrations.

Closes gh-5789

Refactor code to move from recently deprecated classes.

Closes gh-5822

Reorganize web related classes for better separation of concerns.
Mainly this involves moving classes from `o.s.b.context.embedded`
that aren't directly tied to embedded servlet containers to
`o.s.b.web` and relocating everything from `o.s.b.context.web`.

See gh-5822

Move the @LocalServerPort to org.springframework.boot.context.embedded
since it's only really useful when working with embedded servlet
containers.

See gh-5822

Rework ServletComponentRegisteringPostProcessor to break the direct link
to the `org.springframework.boot.context.embedded` package.

See gh-5822

When Spring Security and its spring-security-test module are on the
classpath, `@WebMvcTest` will now auto-configure Spring Security and
configure its MockMvc-based test support. This behaviour can be
disabled using the new secure attribute on `@WebMvcTest` and
`@AutoConfigureMockMvc`.

Closes gh-5476

Previously, when @AliasFor was used, the value of the mapped property
would be incorrect as the value of the canonical attribute would be
used, rather than the value of the alias.

This commit updates AnnotationsPropertySource to use a merged annotation
as the source of attribute values, thereby ensuring that any aliased
attributes are configured correctly.

Closes gh-5821

Previously, meta-annotations were not considered when looking for
annotations that may have property mappings but were considered when
looking for a `@PropertyMapping` annotation. This led to three
problems:

1. Properties that should have been included in the property source
   were not included
2. Properties that were included may have had the wrong name
3. Properties were included when they should not have been

`@DataJpaTests` provided a concrete example of all three problems:

1. The `replace` and `connection` attributes from
   `@AutoConfigureTestDatabase` were not included in the property
   source
2. The `showSql` attribute from `@DataJpaTest` was mapped as
   `spring.test.database.spring.jpa.show-sql`
3. The `useDefaultFilters` attribute from `@DataJpaTest` was included
   in the property source.

This commit updates AnnotationsPropertySource to consider
meta-annotations when looking for attributes that should be mapped.
This addresses the first problem. Furthermore,
AnnotationsPropertySource has been updated to no longer consider
meta-annotations when looking for a type-level property mapping.
This addresses the second and third problems.

Closes gh-5794

Rabbit client 3.6.* uses TLSv1.1 as the default algorithm which
many brokers are deisabling these days. Spring AMQP supports
changing the algorithm by name, so this is just a pass thru for
that.

Closes gh-5800

Closes gh-5807

* pr/5806:
  Fix spring-boot-sample-cache Infinispan example

Closes gh-5800
Closes gh-5806

* pr/5807:
  Polish spring-boot-sample-cache README

Closes gh-5807

* pr/5809:
  Move AnsiColorsTests to `src/test/java`

Closes gh-5809

* pr/5812:
  Fix spring-boot-sample-data-neo4j description

Replace "Redis" with "Neo4j".

Closes gh-5812

Closes gh-5166

This shouldn't have been committed.

* pr/4836:
  Add external-file-property to LogFileMvcEndpoint

Add an additional property to LogFileMvcEndpoint to allow log files to
be read from an external location. This is helpful when a launch.script
is used to start the boot-application and the logfile is written by a
redirect of stdout/stderr.

Fixes gh-4255
Closes gh-4836

* pr/5453:
  Fix remote shell to support custom banners

Update the remote shell to use the `Banner` interface when possible.

Fixes gh-3988
Closes gh-5453

Add a SslStoreProvider interface that can be used to load key and trust
stores from non file locations.

Fixes gh-5208

Closes gh-5782

Closes gh-5751

Closes gh-3044

Closes gh-5786