fix class loading with new hashing algorythm

FIX class loading. Now we initiate the BBB API on parent class to use the new hashing algorythm. It's not necessary to use our own urlBuilder instance.

classes/class.ilBBB.php

@@ -10,10 +10,8 @@ class ilBBB extends BigBlueButton
 {
     public function __construct($securitySecret=null, $baseUrl=null)
     {
-        parent::__construct();
-        $this->securitySecret = $securitySecret;
-        $this->bbbServerBaseUrl = $baseUrl;
-        $this->urlBuilder       = new UrlBuilder($this->securitySecret, $this->bbbServerBaseUrl);
+        parent::__construct($baseUrl, $securitySecret);
+
         //Add Proxy
         if(ilProxySettings::_getInstance()->isActive())
         {