Review Java Buildroot Level 2 dependencies

[yselkowitz]

Let's see what we might be able to prune from the tail end of the Java stack.

[yselkowitz]

• extra-enforcer-rules: https://src.fedoraproject.org/rpms/velocity/pull-request/6

(Other packages still require maven-enforcer-plugin, but that is a possible target as well.)

[yselkowitz]

maven-enforcer-plugin:

• https://src.fedoraproject.org/rpms/apache-parent/pull-request/11
• https://src.fedoraproject.org/rpms/maven-parent/pull-request/14
• https://src.fedoraproject.org/rpms/maven-resolver2/pull-request/1
• https://src.fedoraproject.org/rpms/ongres-stringprep/pull-request/10