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

Closes gh-4149

Spring Boot supports the automatic configuration of an additional
HazelcastInstance if one already exists and an explicit property has been
set to use a different configuration for caching. So three cases are
supported really: no `HazelcastInstance` exists so we need to create one
anyway or an `HazelcastInstance` already exists; in that latter case, we
should either reuse it or create a new one.

Unfortunately, the conditions that checked those three use cases were
not ordered consistently and we could easily get in a situation where
both conditions were evaluated.

This commit makes sure that we  first check if an `HazelcastInstance`
exists and then (and only then) we create the missing `HazelcastInstance`
used for caching. The tests have also been improved to validate the
proper `HazelcastInstance` is used for caching.

Closes gh-5181

The integration tests for the Spring Data Cassandra sample application
fail intermittently, apparently due to Cassandra failing to start
within the default timeout period of 10000ms.

In attempt to get the tests to pass reliably, this commit increases
the timeout to 60000ms (1 minute).

Closes gh-5143

Closes gh-5155

Closes gh-5151

Previously, if one wants to create a custom `JmsListenerContainerFactory`
or `RabbitListenerContainerFactory`, a bunch of code from the auto-
configuration must be duplicated.

This commit introduces two services to configure such factory for JMS
and AMQP with the same sensible defaults that were applied by the
auto-configufrations.

Closes gh-5138

Previously, if an application had been started without remote
debugging enabled, an attempt to connect to it via
RemoteSpringApplication and the HTTP tunnel would result in the
application being hammered by connection attempts for 30 seconds.

This commit updates the tunnel server to respond with Service
Unavailable (503) when a connection attempt is made and the JVM
does not have remote debugging enabled. When the client receives a
503 response, it now logs a warning message describing the possible
problem before closing the connection.

The client has also been updated to provide improved diagnostics when
a connection to the tunnel server cannot be established, for example
because the remote URL is incorrect, or the remote application isn't
running.

Lastly, the client has been updated so that it continues to accept
connections when a connection to the server is closed. This allows
the user to correct a problem with the remote application, such as
restarting it with remote debugging enabled, without having to also
restart the process that's running RemoteSpringApplication.

Closes gh-5021

Previously, WebRequestTraceFilter would call request.getParameterMap()
before deciding whether or not the parameters should be included in
the trace. For a POST request, this had the unwanted side-effect
of always reading the request body.

This commit updates WebRequestTraceFilter so that it checks that
parameters are to be included in the trace before calling
request.getParameterMap()

Closes gh-5089

Closes gh-5122

Closes gh-5073

Closes gh-5131

Previously an in-memory database that wasn’t pooled (an
EmbeddedDatabase) would be shutdown when the context restarted, but
an in-memory database wrapped in a connection pool was not. This meant
that the former would be be wiped clean after each restart, whereas the
latter would not. In addition to being inconsistent, this also
caused problems with schema.sql and data.sql scripts when using
DevTools. If you were using an in-memory database wrapped in a
connection pool, a failure may occur during a restart as the scripts
were not being run against in clean database.

This commit adds an auto-configured bean to DevTools that, when the
context is being closed, will execute “SHUTDOWN” if it identifies that
the DataSource is not an EmbeddedDatabase and is for an in-memory
database.

Closes gh-4699

Also, the section on `server.*` configuration was poor so this commit
also improves it.

Closes gh-4989

Previously, WebSocketMessagingAutoConfiguration added a single
additional converter. This was a MappingJackson2MessageConverter
configured with the auto-configured ObjectMapper.
AbstractMessageBrokerConfiguration places additional converters before
any of the default converters. This meant that the auto-configuration
had the unwanted side-effect of changing the ordering of the
converters. A MappingJackson2MessageConverter was now first in the
list, whereas, by default, it's last in the list after a
StringMessageConverter and a ByteArrayMessageConverter.

This commit updates WebSocketMessagingAutoConfiguration so that it
switches off the registration of the default converters and registers
a StringMessageConverter, ByteArrayMessageConverter and
MappingJackson2MessageConverter in that order. A test has been
added to verify that the types of these three converters match
the types of the default converters. A second test that verifies
that String responses are converted correctly has also been added
alongside the existing test that verified the behaviour for JSON
responses.

Closes gh-5123

Closes gh-4936

When the `locations` attribute is set for a given bean annotated with
`@ConfigurationProperties`, the configuration at these specified
locations take precedence over any other property sources. This means
that such values can't be overridden by a system property or a command
line switch for instance.

This commit clarifies this rules in the documentation.

Closes gh-5111

DriverClassNameProvider is unused but was probably restored by a merge
commit at some point. It wasn't obvious and updated that class rather
than `DatabaseDriver`.

This commit updates `DatabaseDriver` and deletes
`DriverClassNameProvider`.

Closes gh-5076

Closes gh-5044

Closes gh-5108