fix install of business template

in case a container is a WebSite, container._getOb("id") can return any object
with id "id". If object returned is not inside container, later
container.manage_delObjects([object_id]) will fail with KeyError.

product/ERP5/Document/BusinessTemplate.py

@@ -1347,7 +1347,12 @@ class ObjectTemplateItem(BaseTemplateItem):
         saved_uid_dict = {}
         subobjects_dict = {}
         portal_type_dict = {}
-        old_obj = container._getOb(object_id, None)
+        try:
+          old_obj = container._getOb(id=object_id, default=None, no_traversal=True)
+        except TypeError:
+          # if TypeError raised, it means we are using _getOb from Zope
+          # components without **kw arg. Retry without invalid arg then.
+          old_obj = container._getOb(id=object_id, default=None)
         object_existed = old_obj is not None
         if object_existed:
           if context.isKeepObject(path) and force:

product/ERP5/mixin/virtual_folder.py

@@ -79,6 +79,14 @@ class VirtualFolderMixin:
     """
       XXX
     """
+    if 'no_traversal' in kw:
+      no_traversal = kw['no_traversal']
+      # remove from kw for later call to _getOb
+      del kw['no_traversal']
+    else:
+      no_traveral = False
+
+    if not no_traversal:
       tv = getTransactionalVariable()
       document_url = tv.get((id,), None)
       if document_url is not None: