Updated all of the test container.cfg.xml to use the log4j2-test.xml instead of log4j.properties.
Updated the installation and example files to reference log4j2.xml instead of log4j.properties.
Updated some comments to reference log4j2.xml instead of log4j.properties and updated the examples in the comments to the new format.
Updated the Valve Proxy App to reference log4j2.xml instead of log4j.properties and updated the System property to use the new constant provided by Log4j 2.x..