[Core] Changed order of module directories (aces#8870)

This change enables the use of project modules for requests that use AjaxHelper.

The order in which the directories are defined, when the LorisInstance is instantiated, determines the order of locations where modules are searched for and registered.

htdocs/AjaxHelper.php

@@ -94,7 +94,7 @@
     $loris = new \LORIS\LorisInstance(
         new \Database(),
         new \NDB_Config(),
-        [__DIR__ . "/../modules", __DIR__ . "/../project/modules"]
+        [__DIR__ . "/../project/modules", __DIR__ . "/../modules"]
     );
     $m     = $loris->getModule($Module);