Closes gh-16682

Closes gh-16682

Closes gh-16682

Closes gh-16949

Update `SpringIterableConfigurationPropertySource` so that they cache
and cache key are not stored in different fields. Prior to this commit
it was possible that the an incorrect cache could be returned from
because the key and cache were out of sync.

This commit also allows more lenient handling of ConcurrentModification
exceptions if they are thrown during cache retrieval.

Closes gh-17017
See gh-17013

* pr/17005:
  Handle all getters first in JavaBeanBinder

Closes gh-17005

Update `JavaBeanBinder.addProperties` to add both `get` and `is` methods
before `set`.

See gh-17005

* gh-17002:
  Add a missing @Test in JavaBeanBinderTests

Closes gh-17002

See gh-17002

Closes gh-16910

Update `TypeExcludeFilter` to exclude `groovy.lang.MetaClass`.

Closes gh-16981

* pr/16892:
  Polish "Allow Tomcat be destroyed regardless of exceptions"
  Allow Tomcat be destroyed regardless of exceptions

See gh-16892

Update `TomcatWebServer` so that lifecycle exceptions are silently
swallowed when attempting shutdown. Prior to this commit it was
possible that a Tomcat instance might not be properly destroyed and
could leave non daemon threads running, which prevent the JVM from
exiting.

Fixes gh-16892

* pr/16944:
  Add Nexmo to list of third-party starters

Closes gh-16944

* pr/16946:
  Use a regex that captures numbers and qualifiers

Fix the regular expression used in the devtools documentation to
include a version number pattern.

Closes gh-16946

* pr/16889:
  Polish "Fix NoClassDefFound when missing Spring Security"
  Fix NoClassDefFound when missing Spring Security

See gh-16889

Update Spring Session auto-configuration to ensure that the
`DefaultCookieSerializer` doesn't break when Spring Security is not
present on the classpath.

Closes gh-16889

See https://github.com/spring-projects/spring-framework/issues/23038.

* pr/16971:
  Polish "Fix Spring Data Cassandra auto-configure condition"
  Fix Spring Data Cassandra auto-configure condition

See gh-16971

Update `CassandraDataAutoConfiguration` do that it's only applied when
a `Cluster` bean is found.

Fixes gh-16971