* pr/13963:
  Polish contribution
  Polish

Closes gh-13963

See gh-13963

* pr/13963:
  Polish

See gh-13963

This commit makes sure that ServletEndpointRegistrar does not add a
duplicate `/` if the basePath is suffixed with it already

Close gh-13964

* pr/13961:
  Optimize some StringBuilder.append() calls

Closes gh-13961

Closes gh-4995

This commit removes support for `activemq-pool` in benefit of
`pooled-jms`. While the former is not JMS 2 compliant, the latter is and
is independent of the ActiveMQ codebase (so potentially reusable in
custom code).

Closes gh-13927

This commit deprecated the properties of `PooledConnectionFactory` that
are no longer supported by an alternative that is a JMS 2 compliant.

This commit also adds a note to warn users that this pool implementation
is not JMS 2 compliant.

Closes gh-13956

* pr/13930:
  Polish "Make RabbitTemplate default receive queue configurable"
  Make RabbitTemplate default receive queue configurable

Closes gh-13930

See gh-13930

* pr/13933:
  Add classpath prefix to the flyway location

Closes gh-13933

* pr/13937:
  Fix deprecation in KafkaAutoConfigurationIntegrationTests

Closes gh-13937

* pr/13941:
  Avoid annotation attribute lookup in OnBeanCondition

Close gh-13941

* pr/13943:
  Polish AutoConfigurationGroup.selectImports()

Closes gh-13943

* pr/13952:
  Remove ex.printStackTrace() in tests

Closes gh-13952

Closes gh-13470

Closes gh-13889