[FIX] API compatibility of monkeypatched method

[IMP] Make _register_hook idempotent as we have to call it in tests

base_technical_features/models/basemodel_monkeypatch.py

@@ -1,18 +1,22 @@
 # -*- coding: utf-8 -*-
-from openerp import models
+from openerp import models, api
 
 
 class BaseModelMonkeyPatch(models.AbstractModel):
     _name = 'basemodel.monkeypatch'
 
     def _register_hook(self, cr):
+        if not hasattr(
+                models.BaseModel, 'base_technical_features_user_has_groups'):
+
             models.BaseModel.base_technical_features_user_has_groups = (
                 models.BaseModel.user_has_groups)
 
+            @api.cr_uid_context
             def user_has_groups(self, cr, uid, groups, context=None):
                 """ Return True for users in the technical features group when
-            membership of the original group is checked, even if debug mode is
-            not enabled.
+                membership of the original group is checked, even if debug mode
+                is not enabled.
                 """
                 if ('base.group_no_one' in groups.split(',') and
                     self.pool['res.users'].has_group(
@@ -23,4 +27,5 @@ class BaseModelMonkeyPatch(models.AbstractModel):
                     cr, uid, groups, context=context)
 
             models.BaseModel.user_has_groups = user_has_groups
+
         return super(BaseModelMonkeyPatch, self)._register_hook(cr)