It's impossible to setup Logger's log level with system property 'liquibase.defaultlogger.level'

I cannot make liquibase to appear log messages logged with log.debug(...).

I guess this should be configured with a system property liquibase.defaultlogger.level (which in my case -Dliquibase.defaultlogger.level=debug), but I found that system property's log level is always overriden to 'info'. This happens in LogFactory.getLogger(...).

http://pastebin.com/6jUg7AcD