Simplify ApacheLogListener.

  - Now using ExternalLogSystemLogListener.
Add more log4j2 logging classes.

  - Provides a ClassLoggingFactory that creates ApplicationLogging instances that delegate to log4j2.
  - BasicConfiguration adds this by default.
  - Also provides ApacheLogging which can be used for ATG-style logging that delegates to log4j2.
Add simplified class name parsing.
Reformat file.
Reformat file.
Refactor configurations and related files.
Move inline XML to its own file.