* pr/7089:
  Fix NoClassDefFoundError when Mockito is missing

Update MockReset class to check for the presence of the MockUtil class
before attempting to use it.

Fixes gh-7065

Closes gh-7040

Closes gh-6986

Closes gh-6978

Closes gh-7068

* pr/7081:
  Polish

Closes gh-7081

* pr/6991:
  Fix thymeleaf-layout-dialect.version in doc

Version 2.0.0 had serval bugs which broke compatibility to older
templates, so the guide should refer the fixed version instead.

Closes gh-6991

Closes gh-7051

Closes gh-7045

Update dependency management to exclude commons-logging and add
an enforcer rule to spring-boot-samples to try and prevent unwanted
commons-logging dependencies from sneaking back in again.

Closes gh-7067

* gh-7064:
  Prevent spring-session from pulling in commons-logging

Closes gh-7064

Closes gh-7063

Closes gh-7062

Closes gh-7061

Closes gh-7057

* pr/7030:
  Polish

Closes gh-7030

Closes gh-7042

Closes gh-6998

* pr/7025:
  Move Restarter in integration tests

Closes gh-7025

Closes gh-7026

Closes gh-7017

Closes gh-7007

* pr/7002:
  Exclude `META-INF/build-info.properties` from restart

Prior to this commit any application configured to write
`META-INF/build-info.properties` could trigger unexpected application
restarts. The problem is particularly prevalent when using Eclipse M2E in
combination with Maven's `spring-boot-maven-plugin` `build-info` goal
and Gradle's `springBoot` `buildInfo()`.

Closes gh-7002

See gh-6978

Remove setResolvePlaceholders() from PropertySourcesPropertyValues
and instead rely only on the constructor.

See gh-6964