Inject WorldCat configuration.

module/VuFind/config/module.config.php

@@ -266,6 +266,7 @@ $config = array(
             },
             'VuFind\WorldCatConnection' => function ($sm) {
                 return new \VuFind\Connection\WorldCat(
+                    $sm->get('VuFind\Config')->get('config'),
                     $sm->get('VuFind\Http')->createClient()
                 );
             },

module/VuFind/src/VuFind/Connection/WorldCat.php

@@ -27,7 +27,6 @@
  * @link     http://vufind.org/wiki/vufind2:developer_manual Wiki
  */
 namespace VuFind\Connection;
-use VuFind\Config\Reader as ConfigReader;
 
 /**
  * WorldCat SRU Search Interface
@@ -57,14 +56,15 @@ class WorldCat extends SRU
     /**
      * Constructor
      *
-     * @param \Zend\Http\Client $client An HTTP client object
+     * @param \Zend\Config\Config $config VuFind configuration
+     * @param \Zend\Http\Client   $client An HTTP client object
      */
-    public function __construct(\Zend\Http\Client $client)
-    {
+    public function __construct(\Zend\Config\Config $config,
+        \Zend\Http\Client $client
+    ) {
         parent::__construct(
             'http://www.worldcat.org/webservices/catalog/search/sru', $client
         );
-        $config = ConfigReader::getConfig();
         $this->wskey = isset($config->WorldCat->apiKey)
             ? $config->WorldCat->apiKey : null;
         $this->limitCodes = isset($config->WorldCat->LimitCodes)