settings: add DATA_UPLOAD_MAX_MEMORY_SIZE
settings: add DATA_UPLOAD_MAX_MEMORY_SIZE

When a request exceeds DATA_UPLOAD_MAX_MEMORY_SIZE, Django returns a 400 error
instead of 413.  Remove the check, since the proxy can return 413 if needed.

Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

pvital/patchew,pvital/patchew,pvital/patchew,pvital/patchew