* gh-5205:
  Fix namespace declarations in Hazelcast xml's and make them consistent

If a JCache provider is started with hazelcast and the default settings,
the underlying `HazelcastInstance` is disposed at the end of the
process, not when the `CacheManager` is closed.

This commit fixes the only test that use such setup.

See also https://github.com/hazelcast/hazelcast/issues/7606

Closes gh-5209

 - Code formatting
 - Javadoc warnings
 - Deprecation warnings

Upgrade to Jetty 9.2.15 and replace use of API that was deprecated
and changed to throw an UnsupportedOperationException in the same
release.

Closes gh-5218

Closes gh-5212

Closes gh-5224

Closes gh-5223

Closes gh-5222

Closes gh-5221

Closes gh-5220

Closes gh-5219

Closes gh-5217

Closes gh-5216

Closes gh-5215

Closes gh-5214

Closes gh-5213

Closes gh-5211

This commit allows to customize the auto-configured `CacheManager` by
exposing a bean of type `CacheManagerCustomizer`. The implementation may
reference the type of a `CacheManager` to determine in which case it has
to be invoked.

Several implementations can be provided and ordered using the regular
`Ordered` interface and `@Order` annotation.

Closes gh-5039

Previously, if endpoints.enabled was false setting
endpoints.docs.enabled=true or endpoints.actuator.enabled=true would
have no effect as their entire configuration class was conditional
on endpoints.enabled being true.

This commit updates the conditions on the configuration class so that
it is conditional on either the actuator or docs endpoint being enabled.

Closes gh-5007

* gh-5032:
  Fix logic for disabling plugins in CrshAutoConfiguration

Plugin disabling logic was broken by e009d3e4. Prior to this change,
a plugin would be disabled if it or any of the implemented interfaces
in its inheritance hierarchy were configured as being disabled. The
offending commit inverted the logic so that the plugin would be
enabled if any part of it was NOT configured as being disabled.

This commit restores the logic such that the early return happens only
in the negative case.

Previously, the tests were written as though
PluginContext#getPlugin(Class) would consider the specified class
against the runtime type of the plugin (not an unreasonable
assumption); rather this method considers the broader 'plugin type'.
This commit rewrites the test to seek by plugin type and assert the
absence of the disabled plugins.

Closes gh-5032

Closes gh-5147

* gh-5168:
  Tag Docker images created by launch script integration tests

Closes gh-5168

Closes gh-5119

Closes gh-5062

Closes gh-5164

Support for configuring an endpoint’s path separately from its id was
introduced in 97255785, but it didn’t work for a variety of reasons:

 1. Some custom MVC endpoints did not have configuration properties
    bound to them
 2. Some generic endpoints rejected the path property as they were
    configured not to ignore unknown fields
 3. The property used to configure the path was dependent on the id
    of the endpoint. This meant that the path property’s name would
    change if the endpoint’s id was changed

This commit addresses these problems:

 1. @ConfigurationProperties has been added to custom MvcEndpoints where
    it was missing
 2. Generic endpoints have been updated to ignore unknown fields,
    allowing the path of their MVC adapter to be configured
 3. Rather than using the id of a generic endpoint to determine the name
    of its path property, the prefix or value of the endpoint’s
    @ConfigurationProperties annotation is used instead. Any generic
    endpoint that is not annotated with @ConfigurationProperties is
    ignored, making its path unconfigurable.

Closes gh-5105

Rework commit b726974b to avoid exposing setters that would permit anyone
to change Spring Boot's defaults. Also, since these are configurers of a
specific instance, they should be named accordingly.

Closes gh-5138

The Jolokia auto-configuration requires ServletWrappingController from
Spring MVC to be on the classpath. This commit updates the
auto-configuration to make it conditional on the presence of this
class.

Closes gh-5153

There's a long cycle when Spring Data REST, Data JPA and Actuator
are used in an app that retrieves its DataSource from JNDI. The cycle
is:

- WebMvcAutoConfiguration
- HttpMessageConverters
- MappingJackson2HttpMessageConverter (needs an ObjectMapper)
- SpringBootRepositoryRestMvcConfiguration
- ObjectMapper
- RepositoryResourceMappings (part of a custom Jackson module)
- Repositories
- EntityManagerFactory (Triggered by application's Spring Data JPA repository)
- HibernateJpaAutoConfiguration
- JndiDataSourceAutoConfiguration
- MBeanExporter (Used to prevent export of DataSource MBean that's already in JMX)
- EndpointMBeanExportAutoConfiguration
- ObjectMapper (Used to format JSON produced by the exported endpoints)

Spring Data Rest caused the ObjectMapper to depend on JPA. JPA depends
on the DataSource. JnidDataSourceAutoConfiguration depends on the
MBeanExporter. Actuator's MBeanExporter requires an ObjectMapper to
produce JSON strings.

This commit breaks the cycle by making JndiDataSourceAutoConfiguration
access the MBeanExporter lazily. Rather than using `@Lazy`. which does
not work with `@Autowired(required=false)`, the application context
is injected and the MBeanExporter is retrieved manually when it is
needed.

Closes gh-4980

* gh-5190:
  Upgrade to Spring Integration 4.2.5.RELEASE

Closes gh-5190

Closes gh-5182