Add a business template to avoid a SyntaxError

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29807 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Tool/ClassTool.py

@@ -575,7 +575,7 @@ class Test(ERP5TypeTestCase):
     """
     Tuple of Business Templates we need to install
     """
-    return (,)
+    return ('erp5_base',)
 
   def enableLightInstall(self):
     """