add method to get default workspace name

Author: dbu

inc/AbstractLoader.php

@@ -138,6 +138,14 @@ public function getWorkspaceName()
         return $this->workspacename;
     }
 
+    /**
+     * @return string name of the default workspace of this repository
+     */
+    public function getDefaultWorkspaceName()
+    {
+        return 'default';
+    }
+
     /**
      * @return string the additional workspace name used for tests that need it
      */