* The configuration will be enriched with default values, when no values are contained for the parameters.
* @param aConfiguration configuration to enrich
* @return the enriched configuration
*/
private EventServiceConfiguration enrich(EventServiceConfiguration aConfiguration) {
final EventServiceConfiguration theDefaultConfiguration = new DefaultConfigurationLoader().load();
final Map<ConfigParameter, Object> theDefaultConfigMap = theDefaultConfiguration.getConfigMap();
for(Map.Entry<ConfigParameter, Object> theConfigEntry: aConfiguration.getConfigMap().entrySet()) {
Object theValue = theConfigEntry.getValue();
if(theValue == null) {