Issue: SPR-11197

Before this change DefaultUserDestinationResolver provided a separate
destination prefix property for identifying "user" destinations in
subscription requests as opposed to in sent messages. Such a separate
property should not be needed.

Issue: SPR-11263

Issue: SPR-11201

Configurers and BeanDefinitionParsers should use
OptionalValidatorFactoryBean instead of
LocalValidatorFactoryBean.

The Optional implementation catches and logs setup
exceptions, useful when a validation API is present on
the classpath but not the actual implementation.

Issue: SPR-11272

Issue: SPR-7831

Issue: SPR-11282

Introduced OptionalValidatorFactoryBean for scenarios where the JSR-303 API is present but no Bean Validation Provider is available (used by the MVC namespace)

Issue: SPR-11272

Issue: SPR-11258

Issue: SPR-9014
(cherry picked from commit f88cbda6)

Issue: SPR-11272
(cherry picked from commit c48da0d9)

Issue: SPR-11272
(cherry picked from commit e3344898)

Issue: SPR-11185

Payload parameters in @MessageMapping annotated
methods can now also be validated when annotated
with a Validation annotation (@Valid, @Validated...).

A default Validator is registered by the MessageBroker
Configurer, but it is possible to provide a list of custom
validators as well.

Issue: SPR-11185

Prior to this commit, some unit tests were using
Spring's Jackson 1.x implementations. Now Jackson
2.x implementations are the default ones used in
unit tests.

Even if Jackson 1.x support is deprecated, Jackson 1.x
unit tests are kept.

Issue: SPR-11121

Issue: SPR-11277

Switch to using nextBytes as generateSeed doesn't seem to be always
supported by all hardware providers.

Issue: SPR-11278

Since the MessageHeaders constructor is makes a copy of the headers and
is protected against a null map, there is no need for the same to be
done in GenericMessage.

Issue: SPR-11268

Issue: SPR-11279

Also simplified cache key 'hashCode' implementation, relying on 'equals' to differentiate between same method on different target classes.

Issue: SPR-11267

Issue: SPR-11259

Also adding several further Joda-Time converters for consistency with JSR-310 converters.

Issue: SPR-11259

Also introduced a default ZonedDateTime-Calendar converter which is not covered by the default convention due to the 'from' method only being defined on GregorianCalendar.

Issue: SPR-11259

Issue: SPR-11265

Issue: SPR-11040

This change involves a general upgrade to Jackson 2.3 in our build.

Issue: SPR-11261

Issue: SPR-11257

Issue: SPR-11154

Issue: SPR-11153

This change splits out an abstract base class from DefaultMockMvcBuilder
with StandaloneMockMvcBuilder switching to extend the new abstract class
(rather than DefaultMockMvcBuilder).

Issue: SPR-11238

Issue: SPR-10469

Issue: SPR-10469

Issue: SPR-11254

Issue: SPR-11254

Issue: SPR-11250

Also completing 4.0's consistency efforts between Spring's cache adapters.

Issue: SPR-11246