[Merge] ~seb128/ubuntu-sponsoring:subdir-for-jsons into ubuntu-sponsoring:master

[Sebastien Bacher]

Sebastien Bacher has proposed merging ~seb128/ubuntu-sponsoring:subdir-for-jsons into ubuntu-sponsoring:master.

Commit message:
Write the json reports in a subdir
    
It's easier to list them this way. Keep the old location for compatibility

Requested reviews:
  Ubuntu Development Team (ubuntu-dev)

For more details, see:
https://code.launchpad.net/~seb128/ubuntu-sponsoring/+git/ubuntu-sponsoring/+merge/399909

Currently browsing http://reqorts.qa.ubuntu.com/reports/sponsoring/ loads the index.html. I'm working on creating some sponsoring KPI and it would be nice to be able to iterate over the records from a directory rather than coding the list of filename.

The reports are also still written to the old location for compatibility reasons in case other scripts or service rely on the current url.

I've deleted the remove use since opening the file in 'w' mode is enough to replace the content
-- 
Your team Ubuntu Development Team is requested to review the proposed merge of ~seb128/ubuntu-sponsoring:subdir-for-jsons into ubuntu-sponsoring:master.