Add to String-Method to Reference

dependency-check-core/src/main/java/org/owasp/dependencycheck/dependency/Reference.java

@@ -97,6 +97,11 @@ public class Reference implements Serializable, Comparable<Reference> {
         this.source = source;
     }
 
+    @Override
+    public String toString() {
+      return "Reference: { name='"+this.name+"', url='"+this.url+"', source='"+this.source+"' }";
+    }
+
     @Override
     public boolean equals(Object obj) {
         if (obj == null) {