`InfoProvider` is now `InfoContributor` and contributes to the `Info`
instance via a builder. The `Info` instance is immutable. Each
contributor can be disabled via the `management.info.<name>.enabled`
key or all can be disabled using `management.info.defaults.enabled` (this
is similar to what the health endpoint does).

By default, all keys from the environment starting with `info.` are
exposed. If a `git.properties` file is present in the classpath, the
content of `GitInfo` is exposed using the `git` key.

A `SimpleInfoContributor` and `AbstractEnvironmentInfoContributor` are
available for convenience. `InfoContributor` instances can be ordered
the usual way, with a default order provided by
`InfoProviderAutoConfiguration#DEFAULT_ORDER`.

Closes gh-3492

See gh-3492

This commit moves `GitInfo` to a general "project info" area that will be
further improved with others project related information.

Deprecate `spring.git.properties` in favour of `spring.info.git.location`

Closes gh-2484

* pr/5318:
  Polish

Closes gh-5318

Closes gh-4283

Previously, only dependency management for logback-classic was
provided. This meant that it was possible for logback-core, upon
which logback-classic depends, to have a different version.

This commit adds dependency management for logback-core, thereby
ensuring that the two dependencies will have the same version.

Closes gh-5304

Shutdown handling has been improved so that it will run after any
EntityManagerFactory beans have been closed. This ensures that Hibernate
can, if configured to do so, drop its schema during restart processing.
Without this change, a benign exception could be logged if the database
was shutdown before Hibernate.

Closes gh-5305

Closes gh-5081

Closes gh-5226

This commit introduces a new failure analyser for
NoUniqueBeanDefinitionException. The analyser provides details of the
consumer whose dependency could not be satisfied and the names and
sources of the non-unique beans.

This analysis requires access to the BeanFactory, so FailureAnalyzers
has been updated to support BeanFactory injection via an analyzer
implementing BeanFactoryAware.

Closes gh-5299

Closes gh-4023

This reverts 2ecb33f7 and largely reverts 2c619f8d.

docker-java 3.0 was causing a variety of problems and it appears that
we can get things working with Docker Java 2.2.x and Jackson 2.6.

See gh-5258

This commit allows to generate the packaged artifact only locally by
adding a new `attach` property. If `attach` is set to `false` explicitly,
only the main artifact is installed/deployed.

Closes gh-5258

Previously, the launch script integration tests ran happily on OS X and
on Bamboo’s Linux instances. With the upgrade to docker-java 3.0 that
is no longer the case with the default DockerClientConfig failing on
Bamboo as the default DOCKER_CERT_PATH location does not exist.

This commit updates the client configuration so that it attempts to
build the configuration once in it default configuration and, if this
fails, it tries again without TLS verification. This skips the check
of DOCKER_CERT_PATH’s validity.

If a `MessageConverter` bean is available, we now associate it to the
created `RabbitTemplate` and `RabbitListenerContainerFactory`. That way,
registering a custom `MessageConverter` is all that's needed.

The Rabbit auto-configuration is now using the new `ObjectProvider` that
offers a nicer API to detect if a primary candidate is available for
optional collaborators.

Closes gh-5088

State is accumulating unnecessarily in AST tranformation instances.
We can fix the ones we have implemented so far just by using a
local variable and passing it into the methods where it is used.
All the methods are private so this change is safe in a point release.

Fixes gh-5283

If a `MessageConverter` bean is available, we now associate it to the
created `JmsTemplate` and `JmsListenerContainerFactory`. That way,
registering a custom `MessageConverter` is all that's needed.

The JMS auto-configuration is now using the new `ObjectProvider` that
offers a nicer API to detect if a primary candidate is available for
optional collaborators.

Closes gh-4282

Previously, Repackager used Java 8 APIs without protecting against the
possibility of a NoSuchMethodError on earlier versions of Java.
This commit wraps the Java 8 APIs in try-catch blocks to ensure
that they do not cause a failure on Java versions before 8, while
still making full use of Java 8's capabilities when available.

Closes gh-5280

Previously, if a bean of type `CacheResolver` was present in the context
the whole cache auto-configuration would back off. If said
`CacheResolver` hasn't been defined via the `CachingConfigurer`
infrastructure, the application context would fail with a rather
unpleasant error message.

It can be quite common to define custom `CacheResolver` beans as the cache
annotations allow to defines custom cache resolvers per operation. This
commit makes sure that the cache auto-configuration will back-off only if
the `CacheResolver` is named `cacheResolver`.

Closes gh-5201

Previously, Animal Sniffer checking of spring-boot-loader-tools
was disabled as it failed with an NPE. This has been fixed in
Animal Sniffer 1.15.

This commit upgrades Animal Sniffer to 1.15 and adds the necessary
annotations to suppress failures for safe usage of sun.* and Java 7
APIs.

Note that UsesUnsafeJava has been copied from spring-boot and made
package-private. This retains the clearer intent of the custom
annotation (versus @IgnoreJRERequirement) while avoiding the change
in the build order that would be necessary for
spring-boot-loader-tools to use the annotation from spring-boot.

Closes gh-5284

See gh-4903

* pr/4903:
  Polish contribution
  Add Caffeine cache support

Closes gh-4903

See gh-4899

Closes gh-5274