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

The docs related to YAML lists were out of date and
lacked an example making it clear how to bind to them.

See gh-501

If the user sets spring.mvc.locale and doesn't provide a @Bean
of type LocaleResolver then a FixedLocaleResolver will be provided.

Fixes gh-697, fixes gh-669

When mapping the ErrorController path to Spring Security it's
important that it starts with "/". This change ensures that is
the case even if the user has omitted the leading "/".

Fixes gh-694

This commit resolves #695 by changing the configuration so that all Java versions from 1.7 and above are allowed.

Fixes gh-693

Fixes gh-692

... it isn't: you have to set spring.datasource.platform

Partial fix for gh-337. See also gh-607 which complements this, but might
conflict on a merge.

User can now set up default properties in the Environment using
@IntegrationTest("foo:bar", "x:y") etc. Using "server.port:0" you
can get Tomcat or Jetty to spin up on a random port. We also add
a test listener that populates "local.server.port" with the actual
port the server started on so you can @Value("${local.server.port}")
inject it into the test case.

See gh-607 (this should make the extension of that PR to samples
much easier)

Otherwise Tomcat will go ahead and uncommit it and handle it again
in the ErrorReportValve (duh!)

Fixes gh-684

See gh-671