Closes gh-17922

Closes gh-17772

This commit adapts to recent changes in Spring Framework.
See spring-projects/spring-framework#23212

See gh-17902

See gh-17901

See gh-17904

See gh-17900

See gh-17899

See gh-17895

Closes gh-17803

Closes gh-17909

See gh-17907

See gh-17896

This commit improves InvalidConfigurationPropertiesException failure
analysis by adding a dedicated description when a single autowiring
constructor is found. When @Component is removed, such constructor is
used for properties binding and will not apply the same semantics as
before.

Closes gh-17750

Closes gh-17906

Closes gh-17905

* pr/17893:
  Simplify some code

Closes gh-17893

See gh-17893

* pr/17884:
  Simplify if statements

Closes gh-17884

See gh-17884

* pr/17875:
  Remove redundant code

Closes gh-17875

See gh-17875

* pr/17874:
  Use hasSize() assertion in favor of length checks

Closes gh-17874

See gh-17874

Closes gh-17889

* pr/17861:
  Map non-null LDAP properties

Closes gh-17861

The userDn and password in LdapContextSource are not nullable. The
default values for userDn and password in LdapProperties are null. When
the values are set to null there will eventually be a
NullPointerException during
AbstractContextSource#setupAuthenticatedEnvironment since HashTable
doesn't allow null for values.

See gh-17861

Closes gh-17887

* pr/17805:
  Polish "Set up SpringLiquibase beans' dependencies by type rather than name"
  Add missing javadoc
  Set up SpringLiquibase beans' dependencies by type rather than name

Closes gh-17805

See gh-17805

See gh-17805

See gh-17805

SecurityMockMvcConfigurer now honors filter order so we can use that instead
of manually adding the filter.

Closes gh-17883

* gh-17876:
  Test the Gradle Plugin against Gradle 5.6

Closes gh-17876