Fix loading of the final results presentation table.

[JohnMwashuma]

User story

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Currently the results page displays an error pop up on initial load. This is because the request headers are big and gets dropped by Nginx and Uwsgi.

Expected behavior

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The page should render a table containing results of all candidates.

Task check list

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• [x] Bump up the default block size for uwsgi. Update this on the tallyho ansible role here.
  • [x] Set the django_wsgi_buffer_size variable.

[faith-mutua]

@JohnMwashuma The issue has been resolved. The form results page now loads without any errors