Fixed the logging configuration and made it more concise.

- Removed console appender because it actually hurts when app writes into
 console: App Servers like Tomcat intercept all such logs and put them into
 catalina.out. This file then grows too fast and it's not convenient to work
 with files like this. Also on the instances where JC, Antarcticle & Poulpe
 are deployed on a single Tomcat, their logs get mixed up and it's hard to
 distinguish which log is which.
- Removed additivity flag from some loggers - they actually should inherit
 the appenders from the root logger. And switched off additivity prevents this.
Fixed migration that tried to truncate data in column  by making it shorter.

While it's bad to change already existing migrations, we have no choice because
JC has already changed these tables. Hopefully soon we'll get rid of this
integration via database, but for now the issue is still current. So because JC
has already increased the size of the column and put large data there, it's
not possible to alter the table to a lower number of symbols because the
data will be truncated (some part will be lost).