aggregator: Add script to get metadata without going through web.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2518 44740490-163a-0410-bde0-09ae8108e29a

modules/aggregator/bin/get.php

+#!/usr/bin/env php
+<?php
+
+require_once(dirname(dirname(dirname(dirname(__FILE__)))) . '/lib/_autoload.php');
+
+if ($argc < 2) {
+	fwrite(STDERR, "Missing aggregator id.\n");
+	exit(1);
+}
+$id = $argv[1];
+
+$gConfig = SimpleSAML_Configuration::getConfig('module_aggregator.php');
+$aggregators = $gConfig->getConfigItem('aggregators');
+
+$aConfig = $aggregators->getConfigItem($id, NULL);
+if ($aConfig === NULL) {
+	fwrite(STDERR, 'No aggregator with id ' . var_export($id, TRUE) . " found.\n");
+	exit(1);
+}
+
+$aggregator = new sspmod_aggregator_Aggregator($gConfig, $aConfig, $id);
+
+$xml = $aggregator->getMetadataDocument();
+echo($xml->saveXML());