Previously, WelcomePageHandlerMapping would forward to index.html.
This assumed that the static path pattern was always /**. If it had
been customised to, for example, /foo/**, then the forward would still
be to index.html and a 404 would result as the page is actually
available at /foo/index.html.

At first glance, it would appear that the forward should be made to
foo/index.html. However, as it's a forward rather than a redirect,
any relative URLs in the index.html page would then be resolved using
/ whereas they should be resolved using /foo/. This could be addressed
by using a redirect rather than a forward, but we don't want to do
that as it's more invasive and would require a roundtrip back to the
client. Instead, this commit simply stops performing the forward when
the static path pattern is not /**.

Closes gh-8788

Closes gh-8294

Closes gh-8497

This commit restore the disabling of datasource initialization that was
accidently removed in db33a754 so that other tests aren't affected by it.

This commit makes sure that `@EnableTransactionManagement` is
auto-configured with Neo4j. It actually reuses what was done in #8434,
making sure that the `Neo4jDataAutoConfiguration` is ordered properly.

Closes gh-8587

Previously to this commit, transaction management was only enabled when
a `DataSource` is configured. The processing of `@Transactional`
annotations are now enabled as long as a `PlatformTransactionManager` is
present.

Also, the `spring.aop.proxy-target-class` is now honoured if set, still
defaulting to CGLIB mode.

Closes gh-8434

* pr/8781:
  Polish "Use git.commit.id.abbrev if present" contribution
  Use git.commit.id.abbrev if present

Closes gh-8781

Currently GitProperties always shortens the property git.commit.id to an
hardcoded length of 7.

However, both the Maven plugin git-commit-id-plugin and the Gradle
plugin gradle-git-properties are now providing the property
git.commit.id.abbrev along with the propery git.commit.id.
Moreover, the Maven plugin allows to customize the length of the
abbreviated commit ID with the configuration abbrevLength. The Gradle
plugin doesn't allow (yet) to configure this length.

Closes gh-8773

Closes gh-8767

* pr/8660:
  Fix test assertions

Closes gh-8660

* pr/8678:
  Fix propdeps-plugin url in doc

Closes gh-8678

See gh-8698

* pr/8718:
  Fix typo

Closes gh-8718

Closes gh-8498

Closes gh-8746

Closes gh-8745

Closes gh-8744

Closes gh-8743

Closes gh-8742

Closes gh-8741

Closes gh-8740

Closes gh-8739

Closes gh-8738

Closes gh-8734

Closes gh-8733

Closes gh-8732

Closes gh-8731

Closes gh-8730

Closes gh-8729