Closes gh-13559

Previously, LiquibaseEndpoint closed the JdbcConnection but did not
close the Database. When using a connection pool, this could leave the
underlying SQL Connection with its auto commit property set to false.

This commit updates LiquibaseEndpoint to close the Database. This
ensures that it resets that Connection's auto commit property to the
value that it had when the Database was configured to use the
Connection.

See gh-13559

* gh-12859:
  Polish "Fix JSP availability check when not running as a packaged war"
  Fix JSP availability check when not running as a packaged war

Closes gh-12859

See gh-12859

Previously, if an HTTP request that used a templated URI was handled
by something other than Spring MVC, a potentially unbounded number of
metrics would be created. This happened because, in the absence of
Spring MVC's best matching pattern attribute, MetricsFilter would fall
back to using the request's path. If the handling route was templated,
MetricsFilter would be unaware and would record different metrics for
each different path, rather than a single metric for the matching
pattern.

This cimmit updates MetricsFilter so that it falls back to using
unmapped when Spring MVC's best matching pattern attribute is not
available. This ensures that an unbounded number of metrics will no
longer be created, at the cost of losing specific metrics for requests
that are not handled by Spring MVC and that do not use a templated
path.

Closes gh-5875

Closes gh-12729

Log4J2 enables its shutdown hook by default. When the JVM is exiting,
this creates a race between logging that happens during the
application context being closed and Log4J2 being shut down such that
the logging is lost.

This commit updates SpringBootConfigurationFactory so that it
produces a custom sub-class of DefaultConfiguration that disables the
shutdown hook by default. In addition to solving the problem described
above, this also aligns the Log4J2 logging system with the
logging.register-shutdown-hook property which defaults to false.

Closes gh-11360

See gh-13534

Closes gh-12742

Previously, when a user had declared a custom MultipartResolver bean
that is a CommonsMultipartResolver, part resolution would fail. The
failure was occurring as the servlet container was consuming the parts
before CommonsMultipartResolver had a chance to read them. This was
happening because a MultipartConfigElement was being auto-configured.

This commit updates the multipart auto-configuration so that a
MultipartConfigElement is not auto-configured when there is a
CommonsMultipartResolver bean in the context.

Closes gh-7735

Closes gh-13450

Closes gh-13525

Closes gh-13526

* pr/13438:
  Polish "Exclude JUnit from json-simple"
  Exclude JUnit from json-simple

Closes gh-13438

See gh-13438

Closes gh-13458

Closes gh-13456

Closes gh-13464

Closes gh-13463

Closes gh-13196

Closes gh-13352

This commit replaces the use of a GET method by a DELETE method for
testing that the HiddenHttpMethodFilter is ordered before the security
filter. With SPR-16836 changes, only PUT DELETE and PATCH are now
allowed.

Closes gh-13420

Closes gh-13412

Closes gh-13368

Closes gh-13387

Closes gh-13386

Closes gh-13385

Closes gh-13384

Closes gh-13383

Closes gh-13382

Closes gh-10933

Closes gh-13368

Update `TomcatResources` so that `META-INF/resources` folders in
`src/main/resources` no longer fail with a "URI is not hierarchical"
exception.

Closes gh-13265