Merge pull request ILIAS-eLearning#6229 from mjansenDatabay/hotfix/8/…

…37776

SOAP: Fix plugins not working in ILIAS 8(initialisation)

webservice/soap/include/inc.soap_functions.php

@@ -1097,6 +1097,7 @@ public function __call($name, $arguments)
         // Note: We need to bootstrap ILIAS in order to get $ilPluginAdmin and load the soap plugins.
         // We MUST use a context that does not handle authentication at this point (session is checked by SOAP).
         ilContext::init(ilContext::CONTEXT_SOAP_NO_AUTH);
+        require_once 'Services/Init/classes/class.ilInitialisation.php';
         ilInitialisation::initILIAS();
         ilContext::init(ilContext::CONTEXT_SOAP);
         global $DIC;