Logstash does not support log4j2

[vinnylinck]

References:

• http://tech.finn.no/2014/07/01/log4j2-in-production-making-it-fly/
• http://stackoverflow.com/questions/22947786/unable-to-get-log4j-socketappender-working
• https://groups.google.com/forum/#!topic/logstash-users/5L1An2iCrBg

[vinnylinck]

For now, workarounded with JSONLayout through tcp.

[vinnylinck]

This is not for 4.5