Made XML parsing error in configurator more definitive of the error (but still...

Made XML parsing error in configurator more definitive of the error (but still not very verbose about whats the "real" problem"

src/de/tud/kom/p2psim/impl/scenario/DefaultConfigurator.java

@@ -245,13 +245,13 @@ public class DefaultConfigurator implements Configurator {
 			return componentList;
 		} catch (DocumentException e) {
 			throw new ConfigurationException(
-					"Failed to load configuration from file " + configFile, e);
+					"Failed to load configuration from file " + configFile + " (DocumentException)", e);
 		} catch (ParserConfigurationException e) {
 			throw new ConfigurationException(
-					"Failed to load configuration from file " + configFile, e);
+					"Failed to load configuration from file " + configFile + " (ParserConfigurationException)", e);
 		} catch (SAXException e) {
 			throw new ConfigurationException(
-					"Failed to load configuration from file " + configFile, e);
+					"Failed to load configuration from file " + configFile + " (SAXException)", e);
 		}
 
 	}

src/de/tud/kom/p2psim/impl/util/oracle/GlobalOracle.java

@@ -33,11 +33,9 @@ import de.tud.kom.p2psim.api.common.SimHost;
 import de.tudarmstadt.maki.simonstrator.api.Graphs;
 import de.tudarmstadt.maki.simonstrator.api.Host;
 import de.tudarmstadt.maki.simonstrator.api.Randoms;
-import de.tudarmstadt.maki.simonstrator.api.common.graph.DirectedEdge;
 import de.tudarmstadt.maki.simonstrator.api.common.graph.Graph;
 import de.tudarmstadt.maki.simonstrator.api.common.graph.IEdge;
 import de.tudarmstadt.maki.simonstrator.api.common.graph.INode;
-import de.tudarmstadt.maki.simonstrator.api.common.graph.Node;
 import de.tudarmstadt.maki.simonstrator.api.component.ComponentNotAvailableException;
 import de.tudarmstadt.maki.simonstrator.api.component.core.OracleComponent;
 import de.tudarmstadt.maki.simonstrator.api.component.network.NetID;