* pr/6543:
  Polish contribution
  Improve database initializers

Closes gh-6543

This commit improves database initializers for Spring Batch and Spring
Session by introducing `AbstractDatabaseInitializer` which eliminates
duplicated logic in existing initializers. Additionally, database
platform resolution now relies on `DatabaseDriver`.

See gh-6543

Note: the fully-qualified references to @Configuration in some of the
test configuration classes are required to work around a bug in javac.
1.8.0_102 (and earlier). Without them, compilation fails as it cannot
resolve the symbol despite the import statement and the unqualified
references working elsewhere in the same source file.

Closes gh-7056

See gh-7080

* pr/7127:
  Fix typo

Closes gh-7127

Closes gh-7113

Closes gh-6823

* pr/7120:
  Fix String.format() usages

Closes gh-7120

Closes gh-7122

This commit makes sure that a meta-data group exposed via a deprecated
`@Bean` method is deprecated as well. This also works if the class
in which the bean method is defined is itself deprecated.

Closes gh-7100

Closes gh-7098

Closes gh-7117

* pr/7004:
  Polish contribution
  Allow configuration to specify randomly generated database name

Closes gh-7004

See gh-7004

Closes gh-7097

* pr/7111:
  Remove unused parameters in String.format()

Closes gh-7111

The output capture for the deprecation warning only appears to work
when the test is run in isolation. I can't figure out why that's the
case, particularly as we have another test class
(BootRunResourceTests) that uses OutputCapture and works reliably.

I'm cutting my loses and removing the use of OutputCapture and the
assertion that the warnings is logged.

See gh-6997

To be compatible with Gradle's plugin portal, plugins must have an
ID that uses a reverse domain name. This means that spring-boot is
not compatible.

This commit introduces a new ID, org.springframework.boot, and
deprecates the old ID.

Closes gh-6997

Closes gh-6787

* pr/6367:
  Polish contribution
  "spring war" should copy resources to WEB-INF/classes

Closes gh-6367

Closes gh-6351

Closes gh-6825