Fixes gh-124

Prior to this commit, a JmsTemplate bean created automatically by Boot
had its "pubSubDomain" flag enabled. It's far more usual to fallback on
queue rather than topic.

This commit flips the default value of the configuration property.

Fixes gh-626

The dependencies pom.xml now declares an import to the spring-data-releasetrain BOM pom.xml which in turn constraints version numbers for a dedicated release train release. This has the effect of users being able to upgrade to a certain release train by redeclaring the spring-data-releasetrain.version property to e.g. Dijkstra-M1. Individual modules can be upgraded by simply declaring the dependency in the desired version manually in a <dependencies /> or <dependencyManagement /> block.

Removed the explicit declaration for Spring HATEOAS as it is pulled in transitively by Spring Data REST anyway and thus makes sure it's in a compatible version.

If Spring HATEOAS is on the class path, then @EnableHypermediaSupport
will be auto-configured with HAL support.

Fixes gh-708

Upgrade third party dependencies (when appropriate) to the latest
maintenance releases.

Fixes gh-640

Fixes gh-713

Add a section to the "how-to" on customizing third-party dependency
versions when using Maven.

Fixes gh-434

Update reference documentation to include a note explaining that
"blessed" versions a chosen based on the gradle plugin version, and
that builds are repeatable.

Fixes gh-619

* pull718:
  Update Cloud Foundry deployment documentation

Update the Cloud Foundry section of the reference documentation to:

- Reflect the fact that the Cloud Foundry v6 CLI no longer has an
  interactive mode for application push.
- Update some of the CLI output.
- Change links to point to open-source CF docs instead of Pivotal
  commercial docs.
- Add a few links.

Fixes gh-718

Fixes gh-720

Update remaining tests to use random ports.

Fixes gh-337

Update several tests to use random ports instead of hard coding '8080'
or '8081'.

fixes gh-607

Add enforcer rules to ensure that only Java 1.7 is used during the
release.

Fixes gh-712

Remove the mutable getEmbeddedServletContainers() Map from
EmbeddedWebApplicationContext and instead use the `namespace` to
distinguish the management container.

The ServerPortInfoApplicationContextInitializer class replaces the
previous TestExecutionListener to exposes port properties (by
listening for EmbeddedServletContainerInitializedEvents).

Create a new ApplicationPid class to remove the need for SystemUtils
and refactor existing calls.

... to wait for ApplicationContext to close in the 3 tests
that we needed to do so.

Fixes gh-664

Fixes gh-715

Fixes gh-709

Fixes gh-705

Fixes gh-700

This fixes a bug in the sample, where the AuthenticationManager it builds
is a local one for the filter chain containing "/login", whereas it was
expecting to override the Boot default, which is "global". The fix is
to extract the authentication configuration out into a
GlobalAuthenticationConfigurerAdapter.

Fixes gh-699