Remove Apache Commons from 'lib' module, update remaining dependencies

Remove Apache Commons from 'lib' module, update remaining dependencies

Of beanutils, collections, digester and logging actually only digester
and logging are directly used in AspectJ code. Therefore, remove the
unused ones and upgrade the remaining libraries' versions to ones which
also have source JARs on Maven Central. This makes downloading sources
from GitHub and packaging separate commons.jar and commons-src.zip
artifacts superfluous. Hence, we can get rid of them completely.

Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>