views: enable views to delete files completely

[nharraud]

Problem:
Views don't enable to remove files from disk.
As soon as a file is written it is marked as non writable. Thus remove_file_data is not be able to remove them. This task is used in views.py but will not have any effect.

[lnielsen]

I don't think I would change remove_file_data. It's there as a protection mechanism, so it shouldn't try to remove a file if it is not writable. I would rather say that the view/API should handle the situation?

[nharraud]

@lnielsen Ok. I changed the issue's title.
What about adding a force optional argument to remove_file_data which would ignore the writable status. The views would then set it to True whenever an ObjectVersion is deleted and there is a need for garbage collection.
Changing the writable flag would allow other file modifications, which is not what we want.