Insert support for log4j2 [IGNITE-788]

[Gianfranco Murador]

Hello everyone ,
I'm inserting the support for log4j2 in pom maven, to do some tests I need
to know if it is possible to configure at runtime which module using for
logging.
The initial idea is to make coexist both modules for a period, right ?I
have not found an official documentation about the topic.
Thank you,
 Regards,
 Gianfranco