Previously, both Repackager and the Grade plugin used the JRE's
standard ZipOutputStream when creating a fat jar or war file. This
resulted in entry names that needed UTF-8 encoding to become
corrupted.

This commit updates both to use Commons Compress'
ZipArchiveOutputStream and to configure the stream's encoding and
each entry's Unix mode. This ensures that names are encoded using
UTF-8 and can be read back in correctly by common zip tools.

Closes gh-9405

This commit makes sure that each test runs with the proper datasource
auto-configuration and with an isolated embedded database. This allows
to restrict each test to only what it is supposed to do (rather than
disabling initialization to work around the fact that database is not
in a proper state because it is shared).

Closes gh-9579

Closes gh-9574

* pr/9561:
  Improve sample to use fragment expression by thymeleaf 3

Avoid repeated title text making use of capabilities in thymeleaf 3.

Closes gh-9561

Closes gh-9570

* pr/9570:
  Polish

See gh-9570

* pr/9567:
  Polish "Add prefix to all properties in maven plugin"
  Add prefix to all properties in maven plugin

Closes gh-9567

This commit add prefix `spring-boot` to all Mojo's properties.

See gh-9567

Previously, HealthMvcEndpoint stored the cached Health and its last
access time in two separate fields. Neither field was volatile and
no synchronization was used. This meant that there were potential
visibility problems. In a possible worst case scenario one field may
see the updated access time but an old health so it would incorrectly
believe that the old health was up-to-date and return it.

This commit reworks the endpoint to store the cached health and the
time at which it was created in a single, volatile field. This ensures
that the cached health and its creation time will be visible across
threads. Note that a race between threads when the cache is stale is
still possible. This race may result in multiple calls to the
delegate but these should be harmless.

Closes gh-9454

In Gradle 4.x, SourceSetOutput now has multiple classes directories
and getClassesDir() has been deprecated. This commit introduces the
use of reflection to use getClassesDirs() when it's available rather
than getClassesDir().

Closes gh-9559

Closes gh-9563

See gh-9569

Closes gh-9564

See gh-9564

* pr/9544:
  Polish "Use getUsableSpace() in DiskSpaceHealthIndicator"
  Use getUsableSpace() in DiskSpaceHealthIndicator

Closes gh-9544

See gh-9544

Closes gh-9547

This commit makes sure that if the `register-mbeans` property of the
Hikary datasource config is set, Spring Boot doesn't attempt to expose
the mbean again.

Closes gh-5114

Closes gh-9550

* pr/8534:
  Polish
  Polish "Add support for CustomConversions with Cassandra"
  Add support for CustomConversions with Cassandra

Closes gh-8534

This commit add the support for CustomConversions in
spring-data-cassandra. To customize, bean just need to be declared and
it will be auto-configured.

See gh-8534

* pr/9539:
  Upgrade to Spring Retry 1.2.1

Closes gh-9539

Fixes gh-9435