If a class is ignored due to classloading problems the log level shouldn't be debug

In BeanDeployer:99, if a class has classloading problems and is ignored, information about that is logged with the "debug" level, which by default isn't visible in any AS7 logs.

I found this after a long search why some of my beans stopped being visible (when migrating to AS7 the app must now bundle slf4j), and I think it would be much more user-friendly if this was logged at least with an info.