Refactor toString method in Net class for improved output formatting and update unit tests accordingly

src/main/java/net/berack/upo/valpre/sim/Net.java

@@ -253,23 +253,8 @@ public final class Net implements Iterable<ServerNode> {
         var builder = new StringBuilder();
         try {
             for (var node : this.servers) {
-                var dist = node.service.getClass();
-
-                builder.append(node.name)
-                        .append("[servers:")
-                        .append(node.maxServers)
-                        .append(", queue:")
-                        .append(node.maxQueue)
-                        .append(", spawn:")
-                        .append(node.spawnArrivals)
-                        .append(", ")
-                        .append(dist.getSimpleName())
-                        .append("(");
-
-                for (var param : dist.getFields())
-                    builder.append(param.get(node.service)).append(", ");
-                builder.delete(builder.length() - 2, builder.length())
-                        .append(")] -> ");
+                builder.append(node)
+                        .append(" -> ");
 
                 for (var child : this.getChildren(this.indices.get(node))) {
                     var childNode = this.servers.get(child.index);