* gh-15638:
  Polish “Replace custom Neo4j container with Testcontainers version”
  Replace custom Neo4j container with Testcontainers version

Closes gh-15638

See gh-15638

See gh-15638

Closes gh-15893

* gh-15692:
  Polish "Fix stopping of Embedded Mongo before context is closed"
  Fix stopping of Embedded Mongo before context is closed

Closes gh-15692

See gh-15692

See gh-15692

* gh-15799:
  Polish

Closes gh-15799

* gh-15822:
  Polish "Set NO_REQUEST_TIMEOUT as a server option not a socket option"
  Set NO_REQUEST_TIMEOUT as a server option not a socket option

See gh-15822

See gh-15822

* gh-15885:
  Clean up SpringPropertyAction.getValue()

Closes gh-15885

See gh-15885

* gh-15854:
  Polish "Remove dependency management for xml-apis"
  Remove dependency management for xml-apis

Closes gh-15854

See gh-15854

See gh-15854

* gh-15889:
  Do not auto-configure OEMIV filter when user defines registration bean

Closes gh-15889

See gh-15889

* gh-15876:
  Polish "Remove unwanted @Nullable annotations"
  Remove unwanted @Nullable annotations

Closes gh-15876

See gh-15876

See gh-15876

Closes gh-15892

* gh-15791:
  Polish "Test the Gradle plugin against Gradle 4.10.3 and 5.1.1"
  Test the Gradle plugin against Gradle 4.10.3 and 5.1.1

Closes gh-15791

See gh-15791

* pr/15823:
  Polish

Closes gh-15823

* pr/15837:
  Polish

1. Removed unnecessary null checks
2. Combined collection initialization and modification
3. Minor collections related optimizations

Closes gh-15837

* pr/15883:
  Fix broken link to Appendix

Closes gh-15883