Remove cursor, user and context instead use a Transaction

trytond/test/mptt.py

Index: trytond/test/mptt.py
===================================================================
--- a/trytond/test/mptt.py
+++ b/trytond/test/mptt.py
@@ -27,7 +27,7 @@
             'recursive_mptt': 'You can not create recursive Tree!',
         })
 
-    def default_active(self, cursor, user, context=None):
+    def default_active(self):
         return True
 
 MPTT()