[Minor] Removed dependency to ch.eitchnet.log4j and thus added log4j.xml
[Minor] Removed dependency to ch.eitchnet.log4j and thus added log4j.xml

The log4j.xml configuration file is in the test resources and now the
project is completely free of a dependency to a concrete logging
implementation as all logging of the sources is done over slf4j
eitchnet/strolch,4treesCH/strolch,eitchnet/strolch,4treesCH/strolch,4treesCH/strolch,eitchnet/strolch,eitchnet/strolch,4treesCH/strolch