This change adds support for broadcasting messages with unresolved
user destinations so that other servers can try to resolve it.
That enables sending messages to users who may be connected to a
different server.

Issue: SPR-11620

Issue: SPR-11620

Prior to this commit, ClassLevelDirtiesContextTests existed for
verifying the expected behavior of @DirtiesContext declared at the
class level in conjunction with JUnit and SpringJUnit4ClassRunner.

This commit introduces analogous tests for TestNG in the new
ClassLevelDirtiesContextTestNGTests class.

Furthermore, ContextCacheTestUtils and TrackingTestNGTestListener have
been introduced to reduce code duplication across the test suite.

Issue: SPR-12918

Issue: SPR-11841

Issue: SPR-12890

Issue: SPR-12925

The attributes of @JmsListener allows to specify the reference to a key
in the Environment but @SendTo did not.

This commit fixes this inconsistency so that response destinations are
now also externally configurable.

Issue: SPR-12899

AbstractApplicationContext collects early ApplicationEvents and publishes them once the multicaster is available

Issue: SPR-12902

Issue: SPR-12900

Issue: SPR-12905

Previously, the "pubSubDomain" drove the resolution of both the
destination of the listener and the default response destination.

A new "replyPubSubDomain" attribute has been added on the base listener
and  can be used to listen on a topic and reply to a queue (or vice
versa). The attribute is exposed via the "response-destination-type" XML
attribute on the listener container element. It is also available on the
JmsListenerContainerFactory for use with the @JmsListener infrastructure.

Issue: SPR-12911

Issue: SPR-12905

Issue: SPR-12915

Issue: SPR-12910

Issue: SPR-12895

This commit increases the extensibility of
AbstractTestContextBootstrapper by making the resolveContextLoader()
and resolveExplicitContextLoaderClass() methods protected instead of
private.

Furthermore, resolveContextLoader() now throws an IllegalStateException
if getDefaultContextLoaderClass() returns null.

Issue: SPR-12682

This commit improves the documentation for ScriptUtils by explicitly
mentioning that a JDBC Connection supplied to the one of the
executeSqlScript() methods will not be released automatically.

Issue: SPR-12908

This commit introduces isNotEmpty() aliases for the existing hasLength()
methods in StringUtils.

Issue: SPR-12909

Issue: SPR-11771

Issue: SPR-12903

Issue: SPR-12818

The onFailure callback and future.get() occur in different threads so
this change adds a latch to ensure we have both before asserting.

Issue: SPR-12887

AbstractHttpMessageConverter now tries to call getDefaultContentType
with the actual value to be converted to see if that will result in
a more concrete mediat type than application/octet-stream.

Issue: SPR-12894

* dgtombs-SPR-12759:
  Improve RedirectAttributes reference docs

The use of RedirectAttributes was documented in four places in the
reference documentation. This commit merges some of the places and links
properly between them.

Issue: SPR-12759

RuntimeExceptions thrown from FutureAdapter.adapt() should be wrapped in
an ExecutionException, not thrown as is.

Issue: SPR-12887

Issue: SPR-12898

Prior to this commit it was possible to set or get a static field using
ReflectionTestUtils but only if an instance of the target class was
available.

This commit introduces dedicated support for setting and getting static
fields in ReflectionTestUtils when only the target class is available.

Furthermore, this commit increases the robustness of
ReflectionTestUtilsTests regarding expected exceptions and simplifies
the Javadoc for ReflectionTestUtils.

Issue: SPR-6792