It's impossible to setup Logger's log level with system property 'liquibase.defaultlogger.level'
Description
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(...).
Environment
windows 7, java version "1.7.0_40"
