Closes gh-9176

Closes gh-9175

Closes gh-9171

Closes gh-9082

See gh-9080

Closes gh-9080

Closes gh-9080

Closes gh-9075

* pr/9065:
  Polish "Clarify and re-organize docs on caching"
  Clarify and re-organize docs on caching

Closes gh-9065

See gh-9065

CachePublicMetrics wasn't explicitly tested and was still using field
injection. This commit improves the situation in preparation of the fix
for gh-8984

Closes gh-8983

Closes gh-9040

Closes gh-9039

Closes gh-9038

Closes gh-9037

Closes gh-9036

Closes gh-9035

Closes gh-9034

Closes gh-9033

`BasicErrorControllerIntegrationTest` is handling the context in each test
and yet it starts a useless test via `@SpringBootTest`. This commit
removes the useless runner and associated annotations.

Closes gh-8938

See gh-8938

This commit reverts 2deab52a as the Couchbase driver must be upgraded from
2.2.x to 2.4.x

See gh-8938

Closes gh-8938

* pr/8935:
  Upgrade to Spring Integration 4.3.9.RELEASE

Closes gh-8935

Closes gh-8712

* pr/8929:
  Upgrade to Spring AMQP 1.6.9.RELEASE

Closes gh-8929

Closes gh-8497

* pr/8906:
  Polish "Fix statsd metrics collection for names with ":""
  Fix statsd metrics collection for names with ":"

Closes gh-8906

Statsd server is ignoring malformed metrics. This change introduces
a basic sanitizing to metric names for avoid losing those metrics.

See gh-8906

Rename `AbstractTemplateAvailabilityProvider` to
`PathBasedTemplateAvailabilityProvider`.

Closes gh-8913