Ensure any ChildManagementContext created to start a management server
on a different port uses the same EmbeddedServletContainerFactory type.

Fixes gh-5474

Update ServerProperties so that `null` values are not applied when
customizing the EmbeddedServletContainerFactory. Primarily changed to
stop `server.undertow.accesslog.enabled` from being blindly applied.

Fixes gh-5515

Update the auto-configured MessageChannelMetricWriter with
@ExportMetricWriter so that metrics are actually exported.

Fixes gh-5517

Update JettyEmbeddedServletContainerFactory so that requests other than
just GET, POST and HEAD are handled by the ErrorHandler.

Fixes gh-5367

Closes gh-2763

Add a note regarding the use of `@EnableCaching(proxyTargetClass=true)`
for beans that are not interface based.

Closes gh-5527

* image-banner:
  Add image banner documentation
  Rework ImageBanner Support
  Add ImageBanner color distance calculation
  Support image based banners

Closes gh-4647

Refactor several aspects of the ImageBanner:

- Extract a few new classes and methods from the previous code
- Directly encode ANSI rather than using `${}` properties
- Rework the scaling algorithm to prefer a fixed width
- Allow ImageBanner and TextBanner to be used together
- Rename several of the `banner.image` properties
- Add support for a left hand margin
- Add property meta-data

See gh-4647

Support CIE94 color distance calculations for improved ImageBanner
rendering. Based on code originally developed by Michael Simons and
added with his permission.

See gh-4647

Add ImageBanner class that generates color ASCII art based on an image
file (banner.gif, banner.jpg or banner.png).

See gh-4647

To overcome command length limits on Windows, IntelliJ IDEA may launch
an application with a single jar on the classpath that contains that
application's actual classpath in the Class-Path attribute of its
manifest. This would prevent DevTools restarts from working as it
only considered the single jar's URL when identifying changeable URLs
and ignored the URLs added to the classpath via the jar's manifest.

This commit updates ChangeableUrls when it is created from a
URLClassLoader to consider the Class-Path manifest attribute of any
jars in the class loader's URLs. This allows the full classpath to
be considered when identifying URLs that are changeable and that
need to be monitored for restart triggering.

Closes gh-5127

* gh-5617:
  Polish contribution
  Allow embedded Mongo's storage to be configured via the environment

Closes gh-5617

* gh-5627:
  Polish

Closes gh-5627

Closes gh-5629

* gh-5623:
  Upgrade to Spring Data Hopper SR1

Closes gh-5623

When @ConditionalOnBean or @ConditionalOnMissingBean are used on a
@Bean method, they will, in the absence of any other configuration,
attempt to deduce the bean's type by examining the method's return
type. This deduction can fail. See gh-4841, gh-4934, and gh-5624
for some examples of possible failure causes. Previously, this
failure was only logged as a debug message leaving the user with a
misleading message suggesting that the @ConditionalOnBean or
@ConditionalOnMissingBean annotation was not configured correctly.

This commit improves the diagnostics by mention the possibility of
type deduction in the exception message and including the exception
that caused deduction to fail as the cause.

Closes gh-4934

TestPropertySourcesInitializer needs to be ordered with a high
precedence, specifically higher than
ContextIdApplicationContextInitializer, to ensure that any properties
used in setting the context’s id are available in the environment.

Closes gh-4828

The Mustache support should still be usable outside a web application
because the properties only use web stuff in that context and don't
have any field or method signatures that depend on web.

Fixes gh-5626

This commit updates the precedence of properties configured using
@SpringBootTest to align with @TestPropertySource. Properties configured
using properties on @SpringBootTest are now added to the same property
source as those configured using properties on @TestPropertySource so
the precedence described in the javadoc of @TestPropertySource now
applies in full. Additionally, if both @TestPropertySource properties
and @SpringBootTest properties configure the same property, the value
from @TestPropertySource will win.

Closes gh-4828

* pr/5622:
  Add dependency jackson-module-kotlin

Auto-detection for Kotlin Jackson Module was added in Spring 4.3.0.RC1.
This commit provides the dependency management to handle the right
version.

Closes gh-5622

Closes gh-5552

Refine the log directory logic used by Narayana so that it is consistent
with Atomikos and Bitronix.

See gh-5552