Closes gh-6163

Closes gh-6162

As of Spring Framework 4.3, spring-aop now embeds the classes from the
aopalliance:aopalliance jar. This means that the transitive dependency
on aopalliance:aopalliance is redundant and it can be excluded.

Closes gh-6159

Closes gh-6161

Closes gh-6158

Closes gh-6157

See gh-6032

Fixes gh-2460

(according to Eclipse it was broken)

In fact the folder was already created if the app is running as
a different user, but not if running as the current user, so it
was just a question of moving one line out of an if block.

Fixes gh-5986

Closes gh-6150

* pr/6155:
  Polish

Closes gh-6155

Closes gh-5079

This commit adds a Jest-based health indicator for ElasticSearch. If both
Jest and the Spring Data are available, the latter takes precedence as it
provides more information.

Closes gh-3178

This commit adds auto-configuration support for Jest, an HTTP client for
Elasticsearch. If Jest is present, a `JestClient` targeting a local
elasticsearch instance is auto-configured. Several properties from the
`spring.jest.*` namespace allows to tune the client.

Closes gh-6032

Closes gh-6128

See gh-6147

* pr/6117:
  Charon reverse proxy starter added to docs

Closes gh-6117

* 1.3.x-liquibase-endpoint:
  Close connection after use in LiquibaseEndpoint

Update LiquibaseEndpoint so that connections are closed and returned to
the pool after use.

Fixes gh-6118

Update SpringApplicationBuilder so that properties of the form
`abc=d:e:f` are correctly parsed. Prior to this commit the `:` delimiter
would always be chosen over `=`, even if `=` occurred first.

Fixes gh-6121

Update TypeUtils to guard against the use of older Java versions.
Both `Collection` and `Map` type lookups now fallback to generic free
versions of the classes.

Prior to this commit using `xmlbeans-maven-plugin` in combination with
Spring Boot's annotation processor could result in
`IllegalArgumentException: Incorrect number of type arguments`.

Fixes gh-6122

Update BeanDefinitionLoader to support loading from package names that
do not contain dots.

Prior to this commit `new BeanDefinitionLoader(registry, "somepackage")`
would fail because "somepackage" exists and is a resource but does not
contain valid XML. Somewhat surprisingly the InputStream returned by
the resource actually contains the listing of files in the package.

Fixes gh-6126

Update BasicJsonParser to fix potential exceptions if strings happen
to be empty.

Fixes gh-6136

Add `WebMvcRegistrations` which can be used to provide custom
instances of `RequestMappingHandlerMapping`,
`RequestMappingHandlerAdapter` and `ExceptionHandlerExceptionResolver`.
Those instances are then used and processed by the Boot MVC
configuration.

Prior to this commit, developers could provide their custom instances
of MVC infrstructure components such as `RequestMappingHandlerMapping`
and `RequestMappingHandlerAdapter` only by using advanced configuration
strategies. Those advanced configurations involved subclassing
`WebMvcConfigurationSupport` which effectively turns off MVC
auto-configuration in Boot.

Fixes gh-5004
Closes gh-6100

See gh-6041

This commit reverts 62fa602f

See gh-6031

Previously, if a list of ciphers were configured, the default excludes
were still applied. Prior to Jetty 9.3, there were no default exclude but
Jetty 9.3 introduced some and they override the includes.

This commit makes sure that the exclude ciphers are cleared if at least
one cipher is explicitly configured.

Closes gh-6041

Previously, Maven repositories definition was specified in a profile that
is active by default. It means that as soon as any profile is enabled by
the user, said profile is no longer enabled. This has the nasty
consequences of having copy/paste in several places to make sure our own
profiles still have the proper repositories definition.

This commit creates a single "repositories" profile that is always active
unless a given property is explicitely specified. This allows to remove
the duplication and make things more consistent.

Some Gradle-specific repositories were also hard-coded in two modules
without any profile at all, meaning they were polluting the build of
anybody using it. While the impacted modules are gradle specific, that
repository has been shared in the new "repositories" profile as well.

Closes gh-6031

Closes gh-6049

Update `checkstyle.xml` to use fully qualified class names. This reduces
the number of warning log messages when running `mvn -X` and should also
be slightly faster.

Move AnsiOutputApplicationListenerTests to the correct package.