This commit adds a JMS implementation of MessageSendingOperations,
allowing to send JMS messages using Spring's standard Messaging
abstraction.

MessagingMessageConverter is a standard JMS's MessageConverter that
can convert Spring's Message to JMS message and vice versa. Existing
infrastructure has been updated to use this implementation.

Issue: SPR-11772

Servlet 3 multipart request implements getParameterNames defensively (for WebLogic 12 compatibility)

This commit also includes lazy resolution support for StandardServletMultipartResolver, along the lines of existing lazy mode in CommonsMultipartResolver.

Issue: SPR-11074
Issue: SPR-11730

Properly evaluate @Conditional in case of multiple imports for same config class (fixing regression in Spring Boot)

Issue: SPR-11788
(cherry picked from commit 7d78c651)

Servlet/PortletResponse supported as a resolvable dependency now (in particular for web controllers)

This feature required support for response exposure on Servlet/PortletRequestAttributes, instead of just in the Servlet/PortletWebRequest subclasses.

Issue: SPR-11795

Issue: SPR-11791

Issue: SPR-11788

Spring MVC now supports Jackon's serialization views for rendering
different subsets of the same POJO from different controller
methods (e.g. detailed page vs summary view).

Issue: SPR-7156

Issue: SPR-11793

Moved the ResponseEntityBuilder into the ResponseEntity itself.

Issue: SPR-11752

This commit adds a SQLErrorCodes instance for SAP DB, based on a
contribution from Andrew Clemons

Mostly based on SAP Hana SPS 07 with a few additional codes that are
only present is previous versions:

* -813 - Cannot connect to host somehost:30115 [Connection refused]
* -709 - Unknown host somehost:30115 [somehost], -709.]
* -708 - Cannot connect to jdbc:sap://somehost:30115 [Receive of connect failed.]
* -11210 - Invalid column index XYZ.

Issue: SPR-11770

This commit avoids throwing JMSException from the listener execution
as this is not allowed per spec. Our SessionAwareMessageListener
gives a callback that can throw JMSException and we have "abused" it
so far.

Typical message processing goes in those 3 steps:
* Unmarshall the javax.jms.Message to the requested type
* Invoke the actual user method (including processing of method
  arguments)
* Send a reply message, if any

Those three steps have been harmonized so that they don't throw a
JMSException anymore. For the later case, introduced
ReplyFailureException as a general exception indicating the
reply message could not have been sent.

Issue: SPR-11778

ResultSetWrappingSqlRowSet preserves first matching column per name (as defined in ResultSet's javadoc)

Issue: SPR-11786

Issue: SPR-11780

Prior to this commit, RestTemplate's documentation advised to a
DecompressingHttpClient decorator along with Apache's HttpClient in
order to support gzipped responses.

Since this is now deprecated as of Apache HttpClient 4.3+, this commits
update the documentation with HttpClientBuilder.

This commit introduces a ResponseEntityBuilder, which allows for
building of a ResponseEntity through a fluent API.

Issue: SPR-11752

This commit adds an explicit error message when the BackOff instance
has returned BackOffExecution#STOP which basically means that no
further attempts are allowed.

This error message is a convenience way to notify that the container is
about to be shut down.

Issue: SPR-11746

Building against Groovy 2.3 instead of 1.8; updated several dependencies to latest maintenance releases (JasperReports 5.5.2, Tiles 3.0.4, Jetty 9.1.5)

This change adds support for a custom "websocket" scope.

WebSocket-scoped beans may be injected into controllers with message
handling methods as well as channel interceptor registered on the
"inboundClientChannel".

Issue: SPR-11305

Issue: SPR-11769

 This commit separates the BackOff configuration from an actual
 execution. BackOffExecution now contains all the state of a
 particular execution and BackOff is only meant to start (i.e.
 create) a new execution.

 The method "reset" has been removed as its no longer necessary:
 when an execution does not need to be used for a given operation
 anymore it can be simply discarded.

 Issue: SPR-11746

 This commit adds a "back-off" attribute to the jms:listener-container
 element so that a BackOff instance can be provided for users of the
 XML namespace.

 Issue: SPR-11746

Prior to this commit, DefaultMessageListenerContainer was recovering
on failure using a fixed time interval, potentially in an infinite way.

This commit adds an extra "backoff" property to the container that
permits to fine tune the recovery interval using a BackOff instance.

FixedBackOff provides a fixed interval between two attempts and a
maximum number of retries. ExponentialBackOff increases an initial
interval until a maximum interval has been reached. A BackOff instance
can return a special "STOP" time value that indicates that no further
attemps should be made. DefaultMessageListenerContainer uses this
value to stop the container.

protected method "sleepInbetweenRecoveryAttempts" has been renamed
to "applyBackOff" and now returns a boolean that indicate if the
back off has been applied and a new attempt should now be made.

Issue: SPR-11746

Before this change, subscribing to a user destination and use of
@SendToUser annotation required an authenticated user.

This change makes it possible to subscribe to a user destination from
WebSocket sessions without an authenticated user. In such cases the
destination is associated with one session only rather than with a
user (and all their sessions).

It is then also possible to send a message to a user destination
via "/user/{sessionId}/.." rather than "/user/{user}/...".

That means @SendToUser works relying on the session id of the input
message, effectively sending a reply to destination private to the
session.

A key use case for this is handling an exception with an
@MessageExceptionHandler method and sending a reply with @SendToUser.

Issue: SPR-11309

Eventual removal of deprecated AbstractBeanConfigurerAspect, BeanReferenceFactoryBean and CommonsLogFactoryBean

Issue: SPR-11647

This commit migrates the YAML support available in Spring Boot to
the core framework. YAML documents can be loaded either as a
properties object or as a map.

Issue: SPR-9897

This commit updates the documentation of the JMS chapter
with the newly annotated endpoint infrastructure