Code level migration to log4j2
Currently all logging is done to console due to absence of log4j-core.
ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath. Using SimpleLogger to log to the console...
Added log4j2-core as runtime dependency. Not needed for compile time.
Now we get
ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.
due to old log4j config
log4j configuration -> log4j2 configuration.
MainRunner is already working fine locally
Upgraded manifest and IDEA artifact.

This combination is rather duplicating Maven build, right?
I'd like to get rid of it and make maven do all job...
Merge pull request #143 from lrozenblyum/log4j2

Log4j2