[IMP] dms: allow to pass the name value in copy

If the right context key is passed down, then the function
can assume the name was correctly set and not overwrite it.

dms/models/dms_file.py

@@ -552,7 +552,8 @@ def copy(self, default=None):
             names = directory.sudo().file_ids.mapped("name")
         else:
             names = self.sudo().directory_id.file_ids.mapped("name")
-        default.update({"name": file.unique_name(self.name, names, self.extension)})
+        if not self.env.context.get("force_dms_file_name"):
+            default.update({"name": file.unique_name(self.name, names, self.extension)})
         return super(File, self).copy(default)
 
     @api.model_create_multi