Closes gh-7721

Closes gh-7602

Update `SpringBootTestContextCustomizer` to use the full qualified
TestRestTemplate as the registered bean name. Prior to this commit it
was possible that the customizer would replace the relatively common
bean name `testRestTemplate`.

Fixes gh-7711

Update the RelaxedPropertyResolver used to load log properties so that
`${...}` patterns are ignored when possible.

Fixes gh-7719

Closes gh-7710

Closes gh-7707

See gh-7707

See gh-7710

Closes gh-7601

Closes gh-7716

See gh-7681

* pr/7639:
  Broaden LoggingApplicationListener ignores

Update `LoggingApplicationListener` to ignore all `-D` prefixed
property values. As well as catching the Azure use-case, this update
now means Spring Boot application can start when Tomcat is missing
`CATALINA_BASE\conf\logging.properties` and sets the value `-Dnop`.

Closes gh-7639

Update the fix committed in a2d46dc1 to fallback to reflection based
invocation in case earlier versions of Logback are being used.

Closes gh-7638

Update `MockitoPostProcessor` so that `@SpyBean` will automatically
pick the `@Primary` bean when multiple candidates exist.

Fixes gh-7621

Add an integration test to check that @SpyBean can be used with on a
bean definition that returns a generic type.

Closes gh-7625

See gh-7652

Closes gh-7412

Closes gh-7412

See gh-7601

Closes gh-7686

Closes gh-7685

Closes gh-7684

Closes gh-7683

Closes gh-7682

Closes gh-7681

Closes gh-7680

Closes gh-7679

Closes gh-7678

Closes gh-7677

Closes gh-7676

Closes gh-7675

Closes gh-7667

This commits documents the fact that, amongst its property defaults,
devtools is disabling the HTTP cache headers when serving static
resources with Spring MVC.

Fixes gh-7516

Closes gh-7556

Closes gh-7590

Closes gh-7638