Closes gh-9752

This commit updates database initializers configuration to enable them
automatically only when an embedded `DataSource` is used. Related
configuration properties have been updated to use a more expressive
`DatabaseInitializerMode` enum rather than `Boolean` flag.

See gh-9752

Neo4jDataAutoConfiguration is meant to kick in when Spring Data Neo4J is
on the classpath. Yet, we were only checking for the presence of neo4j
itself and the transaction manager provided by spring-tx.

This commit makes sure to back off if Spring Data Neo4J is not present.

Closes gh-10038

This reverts commit 0e645988

Closes gh-10034

* pr/10032:
  Polish

Closes gh-10032

* pr/10033:
  Remove null check before instanceof

Closes gh-10033

Closes gh-10025

Closes gh-10028

Closes gh-7513

This commit makes sure to prevent the Freemarker web auto-configuration
to kick in if `spring-webmvc` is not on the classpath.

Closes gh-10027

This commit introduces manual metadata for the endpoints.all.* namespace
and polish the appendix following the work that happened in #9692

The new endpoint infrastructure does not provide a `path` property so
the manual metadata for older endpoints have been removed.

This commit improves the configuration metadata annotation processor to
explicitly handle `@Endpoint` annotated class. Adding a new endpoint on
a project potentially creates the following keys:

* `endpoints.<id>.enabled`
* `endpoints.<id>.cache.time-to-live`
* `endpoints.<id>.jmx.enabled`
* `endpoints.<id>.web.enabled`

Default values are extracted from the annotation type. If an endpoint
is restricted to a given tech, properties from unrelated techs are not
generated.

Closes gh-9692

Closes gh-10026

* pr/10012:
  Polish "Add link to AMQP 1.0 JMS Binding Spring Boot starter"
  Add link to AMQP 1.0 JMS Binding Spring Boot starter

Closes gh-10012

See gh-10012

Closes gh-10021

Closes gh-10020

Closes gh-10019

Closes gh-9904

This commit adds a new `/application/status` endpoint that provides only
the Health's status of an application.

Previously, `/application/health` was returning full health details or
only the status depending on configuration. Those two use cases are now
separate in two endpoints that can be configured, secured and enabled
separately.

Closes gh-9721

`EndpointProperties` is a left over of the infrastructure in 1.x and is
no longer used. Besides the `endpoints.enabled` property is now
`endpoints.all.enabled`.

Closes gh-10016

This commit restores the configuration properties used to configure how
the ObjectName of an endpoint is generated. For consistency, those
properties have been renamed to `management.jmx`

Closes gh-10005

Closes gh-9895

* pr/10003:
  Upgrade to Narayana 5.6.4.Final

Closes gh-10003